Vakrangee Senior Network Engineer Interview Questions and Answers for Experienced

BGP (Border Gateway Protocol) is a routing protocol used to exchange routing information between different networks on the internet.

• BGP is used to connect different autonomous systems (AS) on the internet.

• It is a path-vector protocol that uses TCP as its transport protocol.

• BGP is used by internet service providers (ISPs) to route traffic between different networks.

• It allows for policy-based routing, where network admin...read more

Data link layer is the second layer of the OSI model responsible for error-free transfer of data between adjacent nodes.

• It provides framing, error control, flow control, and access control.

• Examples include Ethernet, Wi-Fi, and Bluetooth.

• It ensures that data is transmitted reliably and efficiently over the physical layer.

• It also handles addressing and routing of data packets.

There are 7 types of network layers.

• The 7 types are: physical, data link, network, transport, session, presentation, and application.

• Each layer has a specific function in the communication process.

• Examples of protocols at each layer include Ethernet at the data link layer and HTTP at the application layer.

OSPF (Open Shortest Path First) is a routing protocol used to exchange routing information within a single autonomous system.

• OSPF is a link-state protocol that uses Dijkstra's algorithm to calculate the shortest path between two points.

• It is designed to work with large networks and supports VLSM (Variable Length Subnet Masking).

• OSPF uses a hierarchical structure with areas to reduce the amount of routing information ex...read more

A router is a networking device that forwards data packets between computer networks.

• Routers operate at the network layer of the OSI model.

• They use routing tables to determine the best path for data to travel.

• Routers can connect different types of networks, such as LANs and WANs.

• Examples of routers include Cisco, Juniper, and TP-Link.

• Routers can provide security features such as firewalls and VPNs.

A switch is a networking device that connects devices together on a local area network (LAN).

• Switches operate at the data link layer of the OSI model.

• They use MAC addresses to forward data to the correct destination device.

• Switches can improve network performance by reducing network congestion.

• Examples of switches include Cisco Catalyst switches and Netgear ProSAFE switches.