Railtel Corporation Of India Network Engineer Interview Questions, Process, and Tips

A switch is a networking device that connects devices within a local area network (LAN) and forwards data packets between them.

• Switch operates at the data link layer of the OSI model

• It uses MAC addresses to forward data to the correct destination

• Switches increase network performance by reducing collisions and segmenting traffic

• Examples of switches include Cisco Catalyst series, Juniper EX series, etc.

A router is a networking device that forwards data packets between computer networks. It operates at the network layer of the OSI model.

• Routes data packets between different networks

• Uses IP addresses to determine where to send data packets

• Helps in creating and maintaining a network topology

• Can be configured with access control lists to control traffic flow

STP stands for Spanning Tree Protocol. It is a network protocol that prevents loops in a network topology.

• STP is used to prevent broadcast storms and network loops.

• It works by creating a logical tree structure of the network, with one root bridge and multiple branches.

• STP blocks redundant links to prevent loops, but can activate them if the primary link fails.

• STP has different versions, including RSTP and MSTP, which o...read more

A /29 subnet mask allows for 6 usable hosts.

• /29 subnet mask has 3 bits for host addresses

• 2^3 - 2 = 6 usable hosts

• The first and last addresses are reserved for network and broadcast respectively