1.Difference between Routing and Switching ? 2.What is OSPF and explain it ? 3.what is Bgp and explain it? 4.what is Eigrp and explain it.?

Question

Accepted Answer

Routing involves forwarding data packets between networks, while switching involves forwarding data packets within a network.

Routing is the process of determining the best path for data packets to travel from source to destination across different networks.
Switching is the process of forwarding data packets within a network based on MAC addresses.
OSPF (Open Shortest Path First) is a routing protocol used to find the best path for data packets in IP networks.
BGP (Border Gateway Protocol) is an exterior gateway protocol used to exchange routing information between different autonomous systems.
EIGRP (Enhanced Interior Gateway Routing Protocol) is a Cisco proprietary routing protocol that uses a metric based on bandwidth and delay.

Accepted Answer

Routing involves the process of determining the best path for data packets to travel from one network to another. It occurs at the network layer (Layer 3) of the OSI model and is typically performed by devices called routers. Routing decisions are based on factors such as network topology, routing protocols, and administrative preferences.
Switching, on the other hand, involves the process of forwarding data packets within a single network or subnet. It occurs at the data link layer (Layer 2) of the OSI model and is typically performed by devices called switches. Switches use MAC addresses to determine the destination of data packets and forward them accordingly within the local network.
OSPF (Open Shortest Path First):

OSPF is a link-state routing protocol used to determine the best path for data packets within an autonomous system (AS). It is commonly used in large enterprise networks and internet service provider (ISP) networks.
OSPF routers exchange link-state advertisements (LSAs) to build and maintain a topology map of the network. Each router calculates the shortest path to every destination network using the Dijkstra algorithm.
OSPF supports variable length subnet masking (VLSM), allowing for efficient use of IP address space. It also provides features such as authentication, route summarization, and support for multiple areas to scale larger networks.
BGP (Border Gateway Protocol):

BGP is an exterior gateway protocol used to exchange routing information between different autonomous systems (ASes) on the internet. It is the protocol that enables the global routing system to function.
BGP routers exchange network reachability information in the form of routing updates called BGP messages. These messages contain information about the IP prefixes that each AS can reach and the preferred paths to reach them.
BGP is a path vector protocol, which means it considers both the path attributes and the policy decisions of ASes when making routing decisions. It allows for complex routing policies to be implemented, such as traffic engineering and route filtering.
EIGRP (Enhanced Interior Gateway Routing Protocol):

EIGRP is a hybrid routing protocol developed by Cisco Systems. It combines features of both distance vector and link-state protocols to provide fast convergence and efficient use of bandwidth.
EIGRP routers exchange routing information using a distance vector algorithm similar to RIP, but with additional features such as triggered updates and partial updates.
Unlike traditional distance vector protocols, EIGRP routers maintain a topology table and use the Diffusing Update Algorithm (DUAL) to calculate the shortest path to each destination network. This allows for faster convergence and less overhead compared to pure distance vector protocols.
EIGRP supports features such as unequal-cost load balancing, route summarization, and route authentication, making it suitable for both small and large networks.

1.Difference between Routing and Switching ? 2.What is OSPF and explain it ? 3.what is Bgp and explain it? 4.what is Eigrp and explain it.?

Top Disney Star Network Engineer L1 interview questions & answers

Popular interview questions of Network Engineer L1