Infosys Network Engineer Interview Questions, Process, and Tips

BGP routing tables store information about routes to different networks and the best path to reach them.

• BGP uses a path-vector routing protocol to determine the best path for a packet to reach its destination.

• BGP routing tables contain information about the network prefixes, the next hop to reach them, and the path attributes that determine the best path.

• BGP routers exchange routing information with their neighbors to ...read more

NAT is a technique used to map private IP addresses to public IP addresses. Port numbers are used to identify specific applications.

• NAT stands for Network Address Translation

• It is used to allow devices with private IP addresses to access the internet using a public IP address

• Port numbers are used to identify specific applications or services

• Common port numbers include 80 for HTTP, 443 for HTTPS, and 22 for SSH

Default single port range when neither port range in source NAT pools nor default port range are configured.

• When neither port range in source NAT pools nor default port range are configured, the default single port range is 1024 through 63,487.

• This range is used for outbound traffic initiated by the device.

• It is important to configure the port range to avoid conflicts with other devices on the network.

• For example, if m...read more

MSS in TCP refers to the maximum segment size, which is the largest amount of data that can be sent in a single TCP segment.

• MSS is negotiated during the TCP three-way handshake

• It is determined by the maximum transmission unit (MTU) of the network

• MSS can be adjusted by the sender or receiver using TCP options

• A smaller MSS can help prevent fragmentation and improve network performance

Packet drops can be caused by various factors. Troubleshooting involves identifying the root cause and implementing a solution.

• Check for network congestion or bandwidth limitations

• Verify if the packet is being dropped at the source or destination

• Inspect network devices for errors or misconfigurations

• Use packet capture tools to analyze the traffic

• Consider implementing Quality of Service (QoS) policies

• Update firmware or

To check port and duplex setting, MSS and MTU, and link utilization in network engineering.

• Use command 'show interface' to check port and duplex setting.

• Use command 'ping -f -l ' to check MTU.

• Use command 'netstat -s' to check MSS.

• Use command 'show interface' or 'show interfaces utilization' to check link utilization.

Template is a single document or file, while template stack is a collection of templates organized in a hierarchy.

• Template is a standalone document or file used as a starting point for creating new documents.

• Template stack is a collection of templates organized in a hierarchy, where each template can inherit properties from templates above it.

• Template stack allows for easier management and consistency in document creat...read more