RIP Dynamic Routing Protocol

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Questions and Answers

What is the primary factor that determines the chosen path when multiple routes are learned via RIP with the same administrative distance?

The route learned from the nearest neighboring router

The route with the highest hop count

The route with the highest metric

The route with the lowest metric (correct)

What is the purpose of using a multicast address in RIP updates?

To allow multiple routers on the same segment to receive the update (correct)

To allow only one router to receive the update

To prioritize updates based on importance

To reduce the number of updates sent

What is the destination port used in RIP updates?

520 (correct)

540

521

530

What is the protocol used to transport RIP updates?

UDP Signup and view all the answers

What is the application layer service associated with RIP?

Routing Information Protocol Signup and view all the answers

What is the purpose of capturing RIP traffic?

To reinforce the protocols and ports associated with RIP Signup and view all the answers

What is the administrative distance of RIP in the given scenario?

120 Signup and view all the answers

What is the type of routing protocol discussed in the next video?

Link-state routing protocol Signup and view all the answers

What is the primary reason for using RIP in a network environment?

RIP is often used when other routing protocols are not available. Signup and view all the answers

What is the primary advantage of using RIP version 2 over RIP version 1?

RIP version 2 supports variable length subnet masks. Signup and view all the answers

Which of the following describes the routing mechanism used by RIP?

RIP uses a distance-vector routing algorithm, where each router learns routes from its neighbors. Signup and view all the answers

Which layer of the OSI model does RIP operate on?

Layer 3 (Network) Signup and view all the answers

What transport protocol does RIP use at Layer 4?

UDP Signup and view all the answers

What is the well-known destination port used by RIP at Layer 4?

Port 520 Signup and view all the answers

What multicast address does RIP use to send its routing updates at Layer 3?

224.0.0.9 Signup and view all the answers

What is the primary disadvantage of using a distance-vector routing protocol like RIP?

Distance-vector routing protocols can be prone to routing loops, where data packets can be sent in circles. Signup and view all the answers

What is the primary factor that determines which route a router uses when it has learned about a network from multiple sources?

The administrative distance Signup and view all the answers

What is the administrative distance of a static route in a Cisco environment?

1 Signup and view all the answers

Which routing protocol has a higher administrative distance than a static route?

RIP Signup and view all the answers

In the scenario where both static routing and RIP are used, what happens to the route with the higher administrative distance?

It is ignored by the router. Signup and view all the answers

What scenario illustrates the concept of administrative distance effectively?

Comparing health ratings of restaurants Signup and view all the answers

If Router 1 learns about a network via both static routing and RIP, which route will it store in its routing table?

The static route will be stored. Signup and view all the answers

Which of the following statements about administrative distance is false?

It directly affects the speed of data transmission. Signup and view all the answers

In the context of the discussion, what role does Routing Information Protocol (RIP) play?

It dynamically advertises reachable networks. Signup and view all the answers

Which restaurant rating analogy best represents the function of administrative distance in routing?

The health standards compliant rating. Signup and view all the answers

When configuring routes in a routing table, which will be preferred if given a choice between a RIP learned route and a static route?

Static route is preferred. Signup and view all the answers

What does specifying 'router rip' in configuration mode on a Cisco device accomplish?

It configures the router to support RIP routing. Signup and view all the answers

What is the default administrative distance of RIP?

120 Signup and view all the answers

Which network addresses are included when a router is configured with RIP as demonstrated?

10.23.0.0 and 192.168.50.0 Signup and view all the answers

How does R1 determine the next hop for a routed packet?

It uses the layer 3 address of the nearest router. Signup and view all the answers

When R3 starts advertising the 192.168.1.0 network, how does R1 perceive this network?

With a hop count of 2. Signup and view all the answers

What feature in SecureCRT allows sending commands to all active sessions at once?

Command Bar Signup and view all the answers

In RIP, what does the 'hop count' metric indicate?

The number of routers between the source and destination. Signup and view all the answers

What happens when R1 executes a 'show ip route' command?

It lists all learned routes including static and dynamic. Signup and view all the answers

What is the significance of the first number in brackets when viewing routing information?

It denotes the administrative distance. Signup and view all the answers

Study Notes

RIP (Routing Information Protocol)

RIP is a dynamic routing protocol used in networks
It is an old protocol, often used with legacy devices that cannot support newer protocols like OSPF
RIP version 2 supports variable length subnet masks, allowing for advertisements of networks with different masks (e.g., /18, /19, /20)

Distance-Vector Routing Protocol

RIP is a distance-vector routing protocol, meaning that a router only knows information from its directly connected neighbors
A router learns about routes through advertisements from its neighbors, plus any routes learned from other neighbors
Each router only knows what it has learned from its neighbors, not the entire network topology

RIP Advertisements

RIP advertisements are sent using UDP (User Datagram Protocol) at layer 4
The well-known destination port for RIP is 520
Advertisements are sent as multicasts to the address 224.0.0.9 at layer 3

Administrative Distance

Administrative distance is a measure of the believability or preference for a route
It is used to determine which route to use when there are multiple sources for the same route
A lower administrative distance indicates a more preferred route
In Cisco systems, a static route has an administrative distance of 1, while RIP has an administrative distance of 120

Router Decision-Making

When a router learns about a route from multiple sources, it chooses the route with the lower administrative distance
If the administrative distances are the same, the router will choose the route with the lower metric (hop count)

Implementing RIP

To implement RIP, a router must be configured with the router rip command and specify the version and networks to advertise
RIP can be used to dynamically advertise reachability to networks without configuring static routes

RIP-learned Routes

RIP-learned routes are indicated in the routing table with an administrative distance of 120 and a metric (hop count)
The metric indicates the number of hops away the network is from the router

Troubleshooting RIP

RIP updates can be captured and analyzed using tools like SecureCRT or Wireshark
The protocols and ports used by RIP can be identified in the capture (e.g., UDP port 520, multicast address 224.0.0.9)

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Description

Learn about the basics of RIP, a legacy dynamic routing protocol, and how it compares to OSPF. This tutorial covers the details of RIP and provides a demonstration.