TCS iON Network Engineer Interview Questions and Answers

BGP attributes are characteristics used to influence routing decisions in Border Gateway Protocol.

• BGP attributes are used to determine the best path for routing traffic.

• Some common BGP attributes include AS Path, Next Hop, Local Preference, and MED.

• AS Path attribute shows the path of autonomous systems that the route has traversed.

• Next Hop attribute indicates the IP address to reach the next hop for the route.

• Local Pre...read more

RB stands for Routing and Bridging. It refers to the process of forwarding data packets between networks.

• RB is a fundamental concept in networking.

• It involves the routing of data packets between different networks.

• Bridging refers to the process of connecting two or more network segments together.

• RB helps in efficient data transmission and network connectivity.

• Example: RB is used in routers to determine the best path fo

RIP version 1 is a classful routing protocol while RIP version 2 is a classless routing protocol.

• RIP version 1 does not support VLSM (Variable Length Subnet Masking) while RIP version 2 does.

• RIP version 1 does not support authentication while RIP version 2 does.

• RIP version 1 broadcasts routing updates using the destination IP address 255.255.255.255 while RIP version 2 uses multicast address 224.0.0.9.

• RIP version 1 sen...read more

STP (Spanning Tree Protocol) is a network protocol that prevents loops in Ethernet networks by creating a loop-free logical topology.

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

• It works by electing a root bridge and calculating the shortest path to the root bridge for each network segment.

• STP uses Bridge Protocol Data Units (BPDU) to exchange information between switches.

• It employs a ...read more

The OSI model is a conceptual framework used to describe the communication functions of a network.

• The model has 7 layers, each with a specific function.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer communicates with the layer above and below it.

• The model helps ensure interoperability between different network devices and software.

• Example: When you visit a web...read more

SSL offloading is a process of removing SSL encryption from incoming traffic and decrypting it before sending it to the backend servers.

• SSL offloading is performed by a load balancer like F5 to reduce the processing load on backend servers.

• It improves server performance and reduces latency by offloading SSL processing to a dedicated hardware or software.

• F5 SSL offloading can be configured to support multiple SSL certif...read more

SNAT stands for Secure Network Address Translation and is a feature in F5 that allows for the translation of IP addresses.

• SNAT is used to translate the source IP address of outgoing traffic to a different IP address.

• This can be useful in scenarios where multiple devices are sharing a single public IP address.

• SNAT can also be used to improve security by hiding the actual IP address of a device from the public internet.

• F...read more

STP, HSRP, and FRRP are network protocols used for redundancy and failover. HSRP and VRRP are similar but HSRP is preferred.

• STP (Spanning Tree Protocol) prevents loops in a network by disabling redundant links

• HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) provide redundancy by allowing multiple routers to share a virtual IP address

• FRRP (Fast Router Redundancy Protocol) is a Cisco propr...read more

The xlate table in ASA is used to keep track of translations between internal and external IP addresses. It is important for IPsec tunnel troubleshooting.

• The xlate table is used to map internal IP addresses to external IP addresses

• It is important for troubleshooting IPsec tunnels because it allows you to see if traffic is being translated correctly

• You can view the xlate table using the 'show xlate' command in the ASA C...read more