HCLTech Network Engineer Interview Questions, Process, and Tips for Experienced

MED stands for Multi-Exit Discriminator, a BGP attribute used to influence the path selection in a network.

• MED is a 32-bit value included in BGP updates to indicate the preferred path for outbound traffic.

• Lower MED values are preferred by BGP routers when selecting a route.

• MED is typically used to influence outbound traffic flow from one AS to another.

• MED is not mandatory and is only considered when comparing routes fr...read more

To check interface in a router, you can use the show interface command in the router's CLI.

• Access the router's CLI interface

• Use the 'show interface' command to display information about all interfaces on the router

• Check the status, IP address, and other relevant details of the specific interface

OSPF (Open Shortest Path First) is a routing protocol used to find the best path for data packets in a network.

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

• It operates within an autonomous system (AS) and exchanges routing information using link-state advertisements (LSAs).

• OSPF routers maintain a link-state database to build a topology map of the network.

• The shorte...read more

VRF stands for Virtual Routing and Forwarding. It is a technology that allows multiple instances of a routing table to coexist within the same router.

• VRF enables multiple virtual routers to exist within a single physical router

• Each VRF instance maintains its own routing table and forwarding information

• VRF is commonly used in MPLS networks to segregate customer traffic

• VRF provides network segmentation and isolation for

HSRP stands for Hot Standby Router Protocol, a Cisco proprietary redundancy protocol used to provide high availability for network services.

• HSRP is used to provide redundancy for routers in a network by allowing multiple routers to work together in a group.

• One router is elected as the active router, handling traffic for the virtual IP address, while the other routers in the group act as standby routers.

• If the active ro...read more