INTERVIEW PREPARATION ABOUT ROUTING PROTOCOLS

Here's a summary of default routing, static routing, and the mentioned routing protocols along with their characteristics, protocol numbers, port numbers, and broadcast addresses:

Default Routing:

- Used when no specific route exists for a destination.

- Sends traffic to a default gateway, usually a router.

- Network administrators manually configure default routes.

- IPv4: 0.0.0.0/0

- IPv6: ::/0

-AD value is 1

Static Routing:

- Routes are manually configured by the network administrator.

- Suitable for small networks with few routes.

- Can be prone to errors and requires manual updates for changes.

- IPv4: No specific protocol number or port number.

- IPv6: No specific protocol number or port number.

-AD value is 1


RIP (Routing Information Protocol):

- Distance-vector protocol using hop count as a metric.

- IPv4 Protocol Number: 17 (UDP)

- Port Number: 520 (UDP)

- Broadcast Address: 255.255.255.255

-AD value is 120


EIGRP (Enhanced Interior Gateway Routing Protocol):

- Cisco proprietary protocol using bandwidth and delay as metrics.

- IPv4 Protocol Number: 88 (EIGRP)

- Port Number: 88 (EIGRP)

- Broadcast Address: N/A (Relies on multicasts)

-AD value is 90


OSPF (Open Shortest Path First):

- Link-state protocol using cost as a metric.

- IPv4 Protocol Number: 89 (OSPF)

- Port Number: 89 (OSPF)

- Broadcast Address: 224.0.0.5 (All OSPF routers)

-AD value is 110

BGP (Border Gateway Protocol):

- Path-vector protocol for exchanging routing and reachability information.

- IPv4 Protocol Number: 6 (TCP)

- Port Number: 179 (TCP)

- Broadcast Address: N/A (Relies on TCP connections)

-AD value of IBGP is 200

-AD value is EBGP is 20


IS-IS (Intermediate System to Intermediate System):

- Link-state protocol similar to OSPF, commonly used in larger networks.

- IPv4 Protocol Number: 124 (IS-IS over IP)

- Port Number: 149 (IS-IS)

- Broadcast Address: N/A (Relies on link-state updates)

-AD value is 115







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