Routing Protocols: RIP, EIGRP, OSPF, and IS-IS

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Questions and Answers

What is the primary advantage of IGRP over RIP?

IGRP has a maximum hop count of 15

IGRP is more secure than RIP

IGRP broadcasts updates every 90 seconds

IGRP has no maximum hop count limitation (correct)

What is a major limitation of RIP?

It is not suitable for larger networks

It is not secure

It has a maximum hop count of 15 (correct)

It does not support subnet masks

What is a key difference between RIPv1 and RIPv2?

RIPv2 is only used in WANs

RIPv2 is less secure than RIPv1

RIPv2 uses a multicast address (correct)

RIPv2 has a higher maximum hop count

What is a common characteristic of RIP, IGRP, OSPF, and IS-IS?

They all include subnet mask information within updates Signup and view all the answers

What is a benefit of using IGRP over RIP in larger networks?

IGRP can sustain larger networks than RIP Signup and view all the answers

What is a key feature of IGRP that helps prevent routing loops?

It updates itself automatically when route changes occur Signup and view all the answers

What is the layer of the OSI model on which RIP operates?

Application layer Signup and view all the answers

What is a characteristic of RIPv2 that is not present in RIPv1?

Authentication Signup and view all the answers

What is the primary goal of the RIP protocol when choosing routing paths?

To minimize the number of hops a packet travels Signup and view all the answers

Which metric is used to assess the likelihood that a network link will fail?

Reliability Signup and view all the answers

What is the purpose of the 'cost' metric in IP routing protocols?

To configure a value by the administrator or IOS to measure the cost of a route Signup and view all the answers

Which routing protocol uses hop count as a metric to measure the distance to a destination?

RIP Signup and view all the answers

What is the purpose of the 'load' metric in IP routing protocols?

To choose the routing path based on the traffic utilization of connected links Signup and view all the answers

What is the main advantage of using metrics in IP routing protocols?

To allow the protocol to determine which routing path should be chosen to provide the best service to the network Signup and view all the answers

Which protocol is used to compensate for the lack of error-reporting and error-correcting mechanisms in IPv4?

ICMPv4 Signup and view all the answers

What is the purpose of the Internet Group Management Protocol (IGMP)?

To collect information about group membership Signup and view all the answers

What is the primary function of the Address Resolution Protocol (ARP)?

To map dynamic IP addresses to permanent physical machine addresses Signup and view all the answers

At which layer of the OSI model does ARP operate?

Between Layer 2 and Layer 3 Signup and view all the answers

What is the value of the protocol field in the IP datagram when it encapsulates an ICMP message?

1 Signup and view all the answers

Which protocol is not mentioned in the text as an auxiliary protocol to IP?

RIP Signup and view all the answers

What is the length of the IP addresses in IPv4?

32 bits Signup and view all the answers

What is the length of the MAC addresses mentioned in the text?

48 bits Signup and view all the answers

Study Notes

Routing Protocols

RIP (Routing Information Protocol) is one of the first routing protocols, used in LANs and WANs, and runs on the Application layer of the OSI model.
RIPv1 determines network paths based on IP destination and hop count, broadcasting its IP table to all routers connected to the network.
RIPv2 is more sophisticated, sending its routing table to a multicast address, using authentication for security, and choosing a subnet mask and gateway for future traffic.
RIPv2 has a maximum hop count of 15, making it unsuitable for larger networks.

IGRP

IGRP (Interior Gateway Protocol) is a distance vector routing protocol produced by Cisco, building on RIP's foundations to function more effectively in larger networks.
IGRP uses metrics like bandwidth, delay, reliability, and load to compare route viability, with bandwidth and delay used under default settings.
IGRP is ideal for larger networks, broadcasting updates every 90 seconds, and has a maximum hop count of 255.
IGRP is resistant to routing loops, updating itself automatically when route changes occur.

Routing Metrics

Hop count measures the number of routers a packet must travel through, with the goal of minimizing hops.
Other metrics used include bandwidth, delay, reliability, cost, and load.

ICMPv4

ICMPv4 (Internet Control Message Protocol version 4) is a companion to IP, compensating for IP's lack of error-reporting and error-correcting mechanisms.
ICMPv4 provides a mechanism for host and management queries, allowing hosts to determine if a router or another host is alive.

IGMP

IGMP (Internet Group Management Protocol) is used for collecting information about group membership, defined at the network layer.
IGMP messages are encapsulated in IP datagrams, like ICMP messages.

ARP

ARP (Address Resolution Protocol) maps dynamic IP addresses to permanent physical machine addresses in a LAN.
ARP translates 32-bit IP addresses to 48-bit MAC addresses and vice versa.

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Description

This quiz covers different types of routing protocols, including RIP, EIGRP, OSPF, and IS-IS, and their characteristics. Learn about the features and versions of these protocols, including RIPv1 and RIPv2.