Free guides, interview Q&As, and job responsibility breakdowns — curated by industry veterans to help you crack MNC interviews
Answer:
“First, I will check the physical LAN cable and confirm that it is properly connected. Then I will check the link light on the network port, verify that the Ethernet adapter is enabled, and check the IP configuration. Finally, I will test connectivity to the default gateway.”
Steps:
Answer:
“I will reconnect the cable at both ends and check the Ethernet port light. Then I will test with a known-good cable and another switch port. If the problem continues, I will check the network adapter and escalate if the port or wall connection is faulty.”
Answer:
“This is an APIPA address. It usually means the computer could not obtain an IP address from the DHCP server. I will check the cable or Wi-Fi, network adapter, DHCP availability and switch connection.”
Useful command:
Answer:
“I will check the physical connection first. Then I will verify the IP address and subnet mask to ensure they are correct. I will check the cable, switch port and VLAN configuration if necessary. I will also remember that some devices block ping, so I will use other connectivity tests if required.”
Answer:
“I will compare the two computers. Since one computer works, the wall connection or switch may be working. I will focus on the affected computer's adapter, cable, IP configuration, driver and network access permissions.”
Answer:
“First, I will check whether the file server is reachable. Then I will verify the user's permissions, security group membership and mapped network drive. If the user receives an access-denied message, I will check share and NTFS permissions.”
Answer:
“I will check the cable, wall jack and switch port. Then I will review the network adapter driver and power-management settings. I will also check whether the issue affects other users on the same switch.”
Answer:
“I will verify the IP address, subnet mask, gateway and DNS settings. Then I will test connectivity to the gateway and the required server. If the network settings appear correct, I will investigate VLAN assignment, firewall rules and access permissions.”
Answer:
“A VLAN is a logical separation of devices within a network. If a switch port is assigned to the wrong VLAN, the user may receive the wrong IP address or be unable to access the required servers and applications. I would verify the user's network assignment and request a switch-port correction from the network team if needed.”
Answer:
“I will treat this as a possible common infrastructure issue. I will identify the affected users and check whether they share a switch, floor connection or network segment. I will notify the network team and provide the affected locations, time of failure and troubleshooting results.”
Answer:
“An IP address identifies a device on the network. A subnet mask identifies the network portion of the address. A default gateway allows the device to communicate with other networks.”
Example:
Answer:
“DHCP automatically assigns IP configuration to computers. If a user cannot obtain an IP address, I will check the network connection, adapter, DHCP server availability and IP lease. If multiple users are affected, I will inform the network team.”
Commands:
Answer:
“This suggests a possible DNS issue. I will check the configured DNS server and test name resolution using nslookup. If necessary, I will flush the local DNS cache.”
nslookup example.com
ipconfig /flushdns
Answer:
“DHCP automatically assigns network settings to a device. DNS translates domain names into IP addresses. DHCP helps the computer join the network, while DNS helps it find services by name.”
Answer:
“I will test connectivity to an external IP address and then test DNS resolution. If the external IP is reachable but domain names fail, I will investigate DNS. If external connectivity also fails, I will check the router, firewall, or WAN connection with the network team.”
Troubleshooting flow:
Gateway → External IP → DNS → Application
Answer:
“Ping checks whether a destination responds over the network. Tracert shows the network hops toward the destination and can help identify where the route may be failing.”
ping 192.168.1.1
tracert example.com
Important: A failed ping or tracert hop does not always prove a fault, because some devices block or deprioritize these probes.
Answer:
“nslookup is used to query DNS and check whether a domain name resolves to an IP address. I use it when a user can connect to the network but cannot access a service by its hostname.”
nslookup intranet.company.com
Answer:
“I will check for an IP address conflict notification and verify the IP configuration of both computers. I will determine whether the address is assigned by DHCP or configured manually. Then I will correct the duplicate assignment according to company procedures.”
Answer:
“I will investigate name resolution. I will use nslookup to check DNS records, verify the configured DNS server and confirm that the correct hostname is being used. If it is a domain server, I will also check the relevant internal DNS records.”
Answer:
“It means that a device reporting the error cannot reach the destination through the current network path. I will check the IP address, subnet, gateway and routing. I will also identify which device generated the message, because that helps locate the problem.”
Answer:
“LAN stands for Local Area Network and connects devices within a local site, such as an office. WAN stands for Wide Area Network and connects different sites or networks over larger distances.”
Example:
Answer:
“I will identify which applications and network paths are affected. Then I will check the branch's LAN connectivity, default gateway, WAN link status and VPN or routing status. I will provide the network team with the source, destination and test results.”
Answer:
“First, I will confirm whether the branch has local LAN and internet connectivity. Then I will check whether the issue affects all branch users or only one user. I will collect the WAN or VPN status and escalate to the network team or service provider.”
Steps:
Answer:
“The local internet may be working while the private connection to head office is failing. I will check VPN connectivity, routing, DNS and access to the application server. If other branch users are also affected, I will escalate it as a possible WAN or site-to-site VPN issue.”
Answer:
“A VPN creates an encrypted connection over a network. If a user cannot connect, I will check internet connectivity, credentials, MFA, VPN client status and the error message. I will also check whether the VPN service is available.”
Steps:
Answer:
“I will confirm that the VPN is connected and check the assigned VPN IP address and routes. Then I will test internal DNS and connectivity to the required server. I will also check whether access policies or split-tunnel settings are affecting the connection.”
Answer:
“Packet loss occurs when network packets fail to reach their destination. It can cause voice-call dropouts, video freezing, slow applications and unstable remote sessions. I will run connectivity tests to identify the affected path and compare results over time.”
Example:
ping -n 50 192.168.1.1
“I will check for packet loss at the gateway and, where appropriate, at external destinations. I will not assume that one failed ping proves packet loss on the network.”
Answer:
“I will check whether the delay occurs for one user, one branch or all locations. Then I will compare response times to the gateway, remote server and application. I will also check packet loss and WAN utilization with the network team.”
Answer:
“Bandwidth is the amount of data a connection can carry per second. Latency is the time it takes data to travel between endpoints. High bandwidth does not necessarily mean low latency.”
Example:
Answer:
“I will focus on the branch's local network and WAN connection. I will check whether the issue affects wired and wireless users, review bandwidth usage and test latency and packet loss. If required, I will request the network team to check the branch circuit and ISP performance.”
Answer:
“I will check whether the laptop has a valid IP address, subnet mask, gateway and DNS server. Then I will ping the gateway, test external connectivity and check DNS. I will also compare with another device on the same Wi-Fi.”
Answer:
“I will determine whether the problem affects one device or multiple users. I will check signal strength, interference, the wireless adapter driver and power-management settings. If several users are affected, I will check the access point with the network team.”
Answer:
“The likely causes are weak signal strength, interference or insufficient access-point coverage. I will test the signal in different locations and compare the results. If coverage is poor, I will report it to the wireless network team.”
Answer:
“A wireless access point allows Wi-Fi devices to connect to a network. If users cannot connect in a particular area, I will check the access point's status, coverage, power and network connection.”
Answer:
“The 2.4 GHz band generally offers better range but may experience more interference. The 5 GHz band usually offers higher speeds over shorter distances, depending on the environment and equipment.”
“I will check the user's location, signal strength and supported wireless bands before recommending a change.”
Answer:
“I will focus on the affected laptop. I will check signal strength, adapter driver, background downloads, IP configuration and whether the laptop is connected to the correct network. I will test another location and compare with a working device.”
Answer:
“A switch connects devices within a local network. A router forwards traffic between different networks. A modem or other ISP termination device provides the connection to the service provider, depending on the network technology.”
Easy way to remember:
Answer:
“I commonly use ipconfig, ping, tracert, nslookup and arp. Each command helps me check a different part of network connectivity.”
| Command | Purpose |
| ipconfig /all | View IP and adapter details |
| ping | Test IP connectivity |
| tracert | Examine the route to a destination |
| nslookup | Test DNS resolution |
| arp -a | View the local ARP cache |
| ipconfig /flushdns | Clear the DNS resolver cache |
| ipconfig /renew | Request a DHCP lease renewal |
Answer:
“I will check the exact error message and confirm the adapter is connected and enabled. Then I will check whether the computer is using DHCP, test the physical connection and investigate DHCP availability. If multiple computers are affected, I will escalate to the network team.”
Answer:
“If I know the server and required TCP port, I can use PowerShell's Test-NetConnection command. This helps determine whether the specific TCP connection can be established.”
Example:
Test-NetConnection server.company.com -Port 443
“If the test fails, I will investigate the server, firewall, routing or service status. I will not assume that the entire network is down.”
Answer:
“Ping tests IP reachability using ICMP. A port connectivity test checks whether a particular TCP port can be reached. A server may block ping while allowing application traffic, so both tests provide different information.”
Answer:
“It means no ping response was received within the allowed time. The destination may be unreachable, there may be packet loss, or a firewall may be blocking ICMP. I will perform additional tests before deciding where the problem is.”
Answer:
“I will open Device Manager and check the Network Adapters section. I will look for disabled devices, warning symbols or missing drivers. Then I will verify the adapter status and test the connection.”
Steps:
Answer:
“I will check the user's device, cable or Wi-Fi, adapter, IP configuration and connectivity. I will compare the results with a working computer in the same location. This helps me isolate whether the issue is device-specific or network-related.”
Answer:
“I will identify the affected users, departments and locations. Then I will check for a common point of failure, such as a switch, access point, VLAN, WAN circuit or shared service. I will raise or update the incident and involve the appropriate infrastructure team.”
Answer:
“I will record the time of occurrence, affected users, error messages and network conditions. I will run repeated connectivity tests and check available logs. If necessary, I will coordinate with the network team to monitor the connection over time.”
Answer:
“I will first acknowledge the urgency and check the user's connectivity. I will troubleshoot the basic LAN or Wi-Fi settings and provide a suitable temporary workaround, such as a working wired connection or approved alternative connection. I will keep the user informed and escalate if the issue requires infrastructure support.”
Answer:
“I will confirm that multiple users are affected and check whether the local LAN is still working. Then I will gather the circuit or VPN status, outage start time and business impact. I will escalate to the network team or ISP through the approved process and provide regular updates until service is restored.”
Answer:
“I will provide the affected users and locations, start time, business impact, error messages, IP configuration and troubleshooting results. I will also include gateway tests, DNS results and any relevant WAN or VPN status.”
Good escalation checklist:
Answer:
“My approach is to identify the scope first. I determine whether the issue affects one user, multiple users or an entire site. I then check the physical connection, network adapter, IP configuration and default gateway. After that, I test DNS, application connectivity and, where relevant, the WAN or VPN connection. If the issue is outside my scope, I escalate with complete troubleshooting details, keep the user informed and track the incident until resolution.”
Answer:
“First, I will check the LAN cable and network adapter. Then I will check the IP address, subnet mask and gateway. If the IP configuration is incorrect, I will investigate DHCP or the switch port configuration.”
Steps:
Answer:
“The blinking light usually indicates link activity, but it does not guarantee correct network access. I will check the IP configuration, gateway, VLAN assignment and network permissions.”
Answer:
“I will check the subnet mask, IP address and VLAN. Then I will test communication with a known working device. I will also check Windows Firewall and whether the devices are actually on the same logical network.”
Answer:
“The new wall port may be disconnected, disabled or assigned to a different VLAN. I will test the cable and port, check the IP address and ask the network team to verify the wall port configuration.”
Answer:
“I will check the network adapter driver, power-management settings, cable, switch port and system logs. I will also check whether the issue occurs after sleep, during high network usage or at a particular time.”
Answer:
“I will test with a known-good cable and switch port. I will check for adapter errors, link drops and switch-port errors with the network team. This will help identify whether the issue is with the endpoint or infrastructure.”
Answer:
“I will check Device Manager for the adapter and any driver errors. I will check BIOS settings if appropriate and reinstall the approved network driver. If the adapter remains undetected, I will investigate hardware failure.”
Answer:
“I will open Network Connections, locate the Ethernet adapter and enable it if permitted. Then I will check its status and test connectivity.”
Answer:
“I will check the assigned IP address, gateway, DNS and access permissions. Then I will test the required server and determine whether the problem is related to routing, VLAN, firewall or authentication.”
Answer:
“I will test the computer using a known-good cable and another working wall port. If the computer works on the second port but not the original, I will report the original port for network testing.”
Answer:
“The computer may incorrectly identify which devices are on its local network. This can cause connectivity problems with local devices or remote networks. I will compare its subnet mask with the approved network configuration.”
Answer:
“I will check the DHCP configuration or manual network settings. Without a valid default gateway, the computer may communicate locally but cannot normally reach other networks. I will correct the configuration through the approved process.”
Answer:
“A static IP address is configured manually or reserved so a device consistently receives the same address. Servers, printers and some network devices may use static addressing or DHCP reservations.”
Answer:
“With static IP addressing, network settings are configured manually. With DHCP, the network automatically assigns settings to the device.”
Answer:
“I will check whether the printer receives its address from DHCP. I will coordinate with the network team to create a DHCP reservation or assign an approved static IP address to ensure consistent access.”
Answer:
“An IP conflict happens when two devices use the same IP address on a network. It can cause intermittent connectivity. I will identify the conflicting devices and correct the duplicate address assignment.”
Answer:
“APIPA stands for Automatic Private IP Addressing. Windows may assign itself an address in the 169.254.x.x range when it cannot obtain an IPv4 address from DHCP.”
Answer:
“DORA describes the four main steps of DHCP address allocation.”
Answer:
“If multiple users cannot obtain IP addresses, I will inform the network team and provide the affected subnet and error details. The team can check available leases, reservations and scope utilization before expanding or correcting the scope.”
Answer:
“A subnet is a smaller logical network within a larger IP network. Subnetting helps organize devices, manage IP addresses and control network traffic.”
Answer:
“The /24 is CIDR notation indicating that 24 bits identify the network portion. Its corresponding IPv4 subnet mask is 255.255.255.0.”
Answer:
“Possible causes include an incorrect VLAN, wrong DHCP scope, an incorrect static IP or an unauthorized DHCP server. I will check the device configuration and escalate the VLAN or DHCP investigation to the network team.”
Answer:
“A DHCP reservation links a device's identifier, usually its MAC address, to a specific IP address on the DHCP server. This allows the device to receive the same address through DHCP.”
Answer:
“A MAC address identifies a network interface at the data-link layer, while an IP address provides logical addressing for communication across IP networks. Network interfaces use both for different purposes.”
Answer:
“I will open Command Prompt and run ipconfig /all. I will locate the relevant Ethernet or Wi-Fi adapter and read its Physical Address field.”
ipconfig /all
Answer:
“I will check whether the hostname resolves using nslookup. Then I will verify the configured DNS server and test connectivity to the resolved IP address.”
Answer:
“A DNS server resolves names to IP addresses. A DHCP server assigns network settings to clients. Both services are important, but they solve different problems.”
Answer:
“Name-based access to websites and internal services may fail. Direct access by IP might still work, depending on routing and application configuration. I will check DNS settings and test name resolution.”
Answer:
“A DNS cache temporarily stores name-resolution results so the computer does not need to query DNS every time. If the cached information is outdated, flushing the cache may help.”
ipconfig /flushdns
Answer:
“An A record maps a hostname to an IPv4 address. A CNAME record points one hostname to another hostname.”
Answer:
“I will investigate DNS resolution, check the DNS server and use nslookup to see whether the domain resolves correctly. I will also consider whether the application depends on a hostname for secure connections or virtual hosting.”
Answer:
“I will run ipconfig /all and look for the DNS Servers field under the active network adapter.”
Answer:
“Split DNS means different DNS responses may be provided for the same domain depending on whether the query comes from an internal or external network. It is often used to provide internal access to company services.”
Answer:
“I will check the hostname, DNS resolution, certificate validity and system date and time. I will not advise the user to bypass the certificate warning. I will escalate any certificate or server configuration issue.”
Answer:
“The Windows hosts file can manually map hostnames to IP addresses. An incorrect entry may send a user to the wrong address. I will inspect it only when appropriate and follow company security procedures before changing it.”
Answer:
“A switch connects devices within a local network. A router forwards traffic between different IP networks, such as between an office LAN and a WAN.”
Answer:
“A managed switch allows administrators to configure and monitor features such as VLANs, port status, speed, duplex and network statistics.”
Answer:
“A switch port is a physical connection where an endpoint or another network device connects to the switch. Its configuration determines how that connection operates.”
Answer:
“An access port typically carries traffic for one assigned VLAN and is commonly used for end-user computers, printers and similar devices.”
Answer:
“A trunk port carries traffic for multiple VLANs between compatible network devices. It is commonly used between switches or between a switch and another network device.”
Answer:
“A VLAN mismatch occurs when a device or switch port is assigned to an incorrect VLAN or the VLAN configuration does not match the intended network design. This can prevent access to required resources.”
Answer:
“Inter-VLAN routing allows devices in different VLANs to communicate through a router or Layer 3 switch, subject to routing and security policies.”
Answer:
“I will check the default gateway, subnet mask, routing and firewall policies. If the issue affects multiple users, I will investigate the routing between the relevant VLANs with the network team.”
Answer:
“A routing table contains information about network destinations and the next hop or interface used to reach them. Incorrect or missing routes can prevent access to remote networks.”
Answer:
“I will use the route print command to view the IPv4 and IPv6 routing tables.”
route print
Answer:
“A default route is used when no more specific route matches the destination. On a typical end-user computer, the default route points toward the default gateway.”
Answer:
“A network loop can occur when redundant Layer 2 connections create a circular forwarding path. It can cause broadcast storms and network instability. I would report widespread connectivity problems to the network team for switch and Spanning Tree investigation.”
Answer:
“STP helps prevent Layer 2 switching loops by controlling redundant paths. It allows network redundancy while preventing loops from disrupting the network.”
Answer:
“I will check the endpoint cable and network adapter first. I will record the times of disconnection and ask the network team to inspect switch-port counters, speed/duplex settings and physical-layer errors.”
Answer:
“PoE stands for Power over Ethernet. It allows compatible devices, such as access points and IP phones, to receive power through the network cable. If PoE power is unavailable or insufficient, the device may not start correctly.”
Answer:
“A WAN circuit is a connection that links geographically separate networks or offices. It may be provided through technologies such as Ethernet services, MPLS, leased lines or internet-based VPNs.”
Answer:
“MPLS stands for Multiprotocol Label Switching. It is used by service providers and enterprises to forward traffic through labelled paths and support managed network services.”
Answer:
“A site-to-site VPN connects networks at different locations. A remote-access VPN connects an individual user's device to a company network.”
Answer:
“I will check internet connectivity, VPN credentials, MFA, client status and the error message. If the issue affects multiple users, I will check for a VPN gateway or service outage and escalate.”
Answer:
“I will check the assigned VPN IP address, routes, internal DNS and application reachability. I will also check access policies and whether the relevant internal network is included in the VPN configuration.”
Answer:
“Split tunneling allows selected traffic to go through the VPN while other traffic uses the user's normal internet connection. Whether this is enabled depends on company security policy.”
Answer:
“It suggests the local LAN may still be operational while connectivity to remote sites or central services is unavailable. I will test the local gateway and internet connection and escalate the WAN issue.”
Answer:
“A failover link is a backup connection that can take over when the primary WAN or internet circuit fails. I would check whether failover occurred and whether the backup link is providing the expected connectivity.”
Answer:
“I will confirm the affected site and outage start time, check local equipment and gateway connectivity, and gather available circuit status and logs. I will raise a provider ticket with the circuit reference and business impact, then track updates until restoration.”
Answer:
“An SLA, or Service Level Agreement, defines agreed service targets such as response and restoration times. During an outage, I will track the incident against the relevant SLA and keep stakeholders updated.”
Answer:
“First, I will determine whether the problem affects one user, one department or the entire site. Then I will check connectivity, latency, packet loss, Wi-Fi signal and network utilization. I will use the results to isolate the likely cause.”
Answer:
“Packet loss occurs when packets sent across a network do not reach their destination. It can cause voice-call issues, video freezing, slow applications and remote desktop disconnections.”
Answer:
“Latency is the time taken for data to travel between two endpoints. High latency can make remote applications and interactive sessions feel slow even when bandwidth is sufficient.”
Answer:
“Jitter is the variation in packet arrival times. High jitter can affect real-time applications such as VoIP and video conferencing.”
Answer:
“Bandwidth is the data-carrying capacity of a connection, usually measured in bits per second. If bandwidth is heavily utilized, users may experience slower transfers and application performance.”
Answer:
“I can send repeated ping requests to a destination and check the percentage of lost packets.”
ping -n 50 192.168.1.1
“I will repeat the test where appropriate and compare the results. A single failed ping does not necessarily prove a network fault.”
Answer:
“pathping combines route discovery with repeated packet testing to help investigate packet loss along a path.”
pathping example.com
“Intermediate devices may limit responses to diagnostic probes, so I will interpret the results alongside other evidence.”
Answer:
“tracert helps show the route to a destination. pathping performs additional testing to estimate packet loss and latency characteristics along that route.”
Answer:
“Possible causes include large file transfers, cloud backups, software updates, video streaming or too many users sharing limited bandwidth. I will check whether utilization is high on one computer or across the network.”
Answer:
“I will check Wi-Fi or LAN stability, latency, packet loss, jitter and available bandwidth. I will also check whether other real-time applications are affected and review the device's CPU and memory usage.”
Answer:
“I will verify the upload and download results using an approved test. Then I will check the connection type, local network usage, Wi-Fi conditions and any upload limits or security inspection. If the problem affects the site, I will escalate it to the network team or ISP.”
Answer:
“A speed test measures only certain aspects of connectivity. The application may be affected by server performance, DNS, latency, packet loss, authentication or application-specific bottlenecks.”
Answer:
“MTU stands for Maximum Transmission Unit. It is the largest packet size that can be carried in a network layer without fragmentation at that layer. An incorrect MTU along a path can cause some connections to fail or behave unexpectedly.”
Answer:
“Yes, a path MTU or fragmentation problem is one possibility. I will collect the affected destinations and symptoms, compare behavior with and without the VPN if permitted, and escalate the evidence to the network team rather than changing MTU settings without approval.”
Answer:
“A duplex mismatch occurs when connected Ethernet interfaces use incompatible duplex settings. It can cause poor performance and errors. I would check link statistics and ask the network team to verify both ends of the connection.”
Answer:
“A firewall controls network traffic based on configured security rules. If an application cannot connect, I will check whether the required traffic is being blocked, using approved troubleshooting tools and logs.”
Answer:
“I will verify the server name, destination IP and required port. Then I will use Test-NetConnection and check whether the server service is running or a firewall is blocking the connection.”
Test-NetConnection server.company.com -Port 443
Answer:
“A closed port generally means the destination is reachable but no service is listening on that port. A blocked port may be filtered by a firewall or another network control. The exact behavior depends on the device and configuration.”
Answer:
“A proxy server acts as an intermediary for network requests. Companies may use proxies for security, filtering, logging or access control. Incorrect proxy settings can prevent users from accessing websites.”
Answer:
“I will compare the browser's proxy settings, extensions, DNS behavior and security configuration. I will also check whether the issue is specific to a profile or application before changing system-wide network settings.”
Answer:
“A MAC allowlist permits devices with specified MAC addresses to connect under a particular network policy. If a device is not authorized, I will follow the company process to verify and register it rather than bypassing access controls.”
Answer:
“802.1X is a network access-control framework used to authenticate devices or users before allowing network access. If authentication fails, I will collect the error details and check the approved supplicant configuration, credentials or certificates.”
Answer:
“I will check the authentication error, user or device credentials and certificate status. I will confirm whether the user is authorized for the network and escalate to the identity or network team if the issue requires policy changes.”
Answer:
“These warnings may indicate a security risk, an untrusted connection or a policy restriction. I will follow the approved security process and escalate the issue instead of bypassing the control.”
Answer:
“I will identify the application, destination and required port. I will test connectivity and check approved logs or security alerts. If a rule change is required, I will submit the evidence to the authorized security or network team.”
Answer:
“I will check whether the printer responds on the network and whether the issue affects one user or everyone. Then I will check the printer IP, print server, queue, driver and permissions.”
Steps:
Answer:
“I will check whether the file server is reachable and whether the drive mapping is disconnected. Then I will test the UNC path, such as \\fileserver\shared, and verify the user's permissions.”
Answer:
“I will check whether the target computer is reachable, whether Remote Desktop is enabled and whether the user has permission. I will also check firewall rules and TCP port 3389 where applicable.”
Answer:
“RDP allows a user to remotely control a computer. VPN creates a secure network connection that can provide access to internal resources. A user may need a VPN before connecting through RDP, depending on the company's setup.”
Answer:
“I will check the remote connection, VPN status, DNS resolution, routing and application access permissions. I will also compare the behavior with a user who can access the website successfully.”
Answer:
“A router forwards traffic between networks using routing information. A firewall enforces security rules to allow or block traffic. Some devices perform both functions.”
Answer:
“I will check whether the SSID is being broadcast, whether the access point is connected to the network and whether it has power and management connectivity. I will also check authentication and configuration with the wireless team.”
Answer:
“Possible causes include an uplink failure, switch configuration problem, power issue or network loop. I will identify the affected switch and users, check the available status indicators and escalate to the network team.”
Answer:
“A Layer 2 network loop can create excessive broadcast traffic and disrupt connectivity. Symptoms may include widespread slowness, packet loss and unstable switch ports. The network team should investigate the switching topology and Spanning Tree status.”
Answer:
“An Optical Network Terminal converts the provider's optical fiber connection into an interface that customer equipment can use, commonly Ethernet. If the ONT shows a loss-of-signal alarm, I will record the indicator status and escalate to the ISP.”
Answer:
“I will record the exact time, duration and affected users. I will check whether scheduled backups, large transfers, network congestion, power events or ISP issues occur at that time. I will use logs and monitoring evidence to identify the recurring cause.”
Answer:
“I will clarify which application or business task is failing. I will check application-specific connectivity, DNS, proxy, authentication and server status. Basic ping success does not prove that every application service is working.”
Answer:
“I will assess the business impact and urgency. If the tickets point to one shared network outage, I will link the reports to a common incident and prioritize the wider impact. I will follow the company's priority and escalation process.”
Answer:
“I will confirm the exact destination and error message. Then I will test DNS resolution, routing, required application ports and server availability. I will share the test results with the network and application teams so they can identify the next point of failure.”
Answer:
“First, I confirmed the scope and identified the affected users and locations. I checked local connectivity and gathered the relevant IP, gateway and remote connectivity results. I raised the incident with the network team, communicated the impact and kept users updated. After service was restored, I documented the root cause, resolution and any preventive actions.”
