10+ Pragna Group Interview Questions and Answers

NAT and PAT are both techniques used in networking to translate IP addresses. NAT translates one IP address to another, while PAT translates multiple IP addresses to a single IP address.

• NAT stands for Network Address Translation and is used to translate private IP addresses to public IP addresses.

• PAT stands for Port Address Translation and is a type of NAT that translates multiple private IP addresses to a single public IP address using different port numbers.

• NAT is typically...read more

RSTP, STP, and MSTP are all protocols used for preventing network loops, but they differ in their speed and complexity.

• STP (Spanning Tree Protocol) is the original protocol used for preventing network loops.

• RSTP (Rapid Spanning Tree Protocol) is an updated version of STP that is faster and more efficient.

• MSTP (Multiple Spanning Tree Protocol) is a more complex protocol that allows for multiple VLANs to be mapped to a single spanning tree instance.

• RSTP is faster than STP becau...read more

HSRP, VRRP, and GLBP are all protocols used for providing redundancy in a network.

• HSRP stands for Hot Standby Router Protocol and is a Cisco proprietary protocol.

• VRRP stands for Virtual Router Redundancy Protocol and is an open standard protocol.

• GLBP stands for Gateway Load Balancing Protocol and is also a Cisco proprietary protocol.

• HSRP and VRRP both provide redundancy by allowing multiple routers to share a virtual IP address.

• GLBP provides redundancy as well as load balanci...read more

OSPF special area is a type of OSPF area that has a different behavior than other OSPF areas.

• OSPF special area includes stub area, totally stubby area, and not-so-stubby area (NSSA).

• In stub area, the area border router (ABR) summarizes external routes as a default route.

• In totally stubby area, the ABR summarizes all routes as a default route.

• In NSSA, external routes are allowed but are translated into internal routes.

• OSPF special area reduces the size of the routing table and...read more

Police creation on firewalls refers to the process of setting up rules and policies to monitor and control network traffic.

• Firewalls act as a barrier between a trusted internal network and an untrusted external network

• Police creation involves setting up rules to allow or block traffic based on specific criteria such as IP address, port number, and protocol

• Firewalls can also be configured to log and alert administrators of any suspicious activity

• Examples of firewall software i...read more

SLA base routing is a method of routing traffic based on service level agreements.

• SLA base routing prioritizes traffic based on the agreed-upon service level agreements.

• It ensures that critical traffic is given priority over less important traffic.

• SLA base routing can be used to ensure that certain applications or services receive the necessary bandwidth and resources.

• It can also be used to ensure that traffic is routed through the most efficient path to meet SLA requirements...read more

Subnetting involves dividing a network into smaller subnetworks for better management and security.

• Class A networks have a default subnet mask of 255.0.0.0 and can be subnetted to create smaller networks.

• Class C networks have a default subnet mask of 255.255.255.0 and can also be subnetted.

• Subnetting allows for better utilization of IP addresses and improves network performance.

• Subnetting also enhances network security by isolating different departments or functions within an...read more

BGP neighbors are configured to establish and maintain BGP sessions between routers.

• BGP neighbors are configured using the neighbor command in router configuration mode.

• The neighbor IP address and remote AS number must be specified.

• BGP neighbors must be directly connected or static routes must be configured.

• BGP sessions can be verified using the show ip bgp summary command.

• Troubleshooting BGP neighbor issues can involve checking network connectivity and verifying BGP configur...read more

A channel is a medium through which data is transmitted from one device to another.

• Channels can be physical, such as copper wires or fiber optic cables, or wireless, such as radio waves or infrared signals.

• Different channels have different bandwidths, which affect the speed and amount of data that can be transmitted.

• Examples of channels include Ethernet, Wi-Fi, Bluetooth, and cellular networks.