NOC Support Engineer Interview Questions and Answers

To monitor two connecting devices, use network monitoring tools to track connectivity, performance, and status.

• Utilize network monitoring software like Nagios, Zabbix, or SolarWinds to monitor devices

• Configure SNMP (Simple Network Management Protocol) on the devices to collect data

• Monitor connectivity by checking link status, packet loss, and latency

• Track device performance metrics such as CPU usage, memory utilization, and bandwidth

• Set up alerts and notifications for any iss...read more

L2 & L3 devices are network devices that operate at different layers of the OSI model. Troubleshooting them involves identifying and resolving issues at each layer.

• L2 devices include switches and bridges, while L3 devices include routers and firewalls.

• Troubleshooting L2 devices involves checking for issues with VLANs, MAC addresses, and port configurations.

• Troubleshooting L3 devices involves checking for issues with IP addresses, routing tables, and access control lists.

• Tools...read more

IP addressing is the method of assigning unique numerical addresses to devices on a network. L2 switches operate at the data link layer, while L3 switches operate at the network layer. Etherchannel is a technology that allows multiple physical links between switches to be combined into a single logical link. PPPOE and PPP are protocols used for establishing WAN connections. DNS is a system that translates domain names into IP addresses.

• IP addressing assigns unique numerical a...read more

The OSI model is a conceptual framework used to understand network communication in seven layers.

• 1. Physical Layer: Deals with the physical connection between devices (e.g., cables, switches).

• 2. Data Link Layer: Ensures error-free transfer of data frames (e.g., Ethernet, Wi-Fi).

• 3. Network Layer: Manages routing of data packets (e.g., IP addressing).

• 4. Transport Layer: Provides reliable data transfer (e.g., TCP, UDP).

• 5. Session Layer: Manages sessions between applications (e.g...read more