Chapter 4

Question 1

Default router or gateway

Answer 1

The router used to send packets to a destination IP located on a different subnet than the source IP

Question 2

Routing table

Answer 2

A list of routes in a router that contains destination subnet and mask, the outgoing router interface, and IP of the next-hop

Question 3

IP network

Answer 3

An IPv4 class A, B, or C network. Also called a classful network

Question 4

IP subnet

Answer 4

A sub-division of an IP network

Question 5

IP packet

Answer 5

Data encapsulated within an IP header

Question 6

Routing protocol

Answer 6

Method by which routers can exchange information about routes to reach subnets in a particular network

Question 7

DDN

Answer 7

Dotted decimal notation, format used to identify IPv4 addresses

Question 8

IPv4 address

Answer 8

Version of the internet protocol defined by RFC 791 and standardized in 1980

Question 9

Unicast address

Answer 9

An IP address that represents a single interface

Question 10

Subnetting

Answer 10

The process of subdividing class A, B, or C networks smaller groups

Question 11

Hostname

Answer 11

The alphanumeric identification of an IP host

Question 12

DNS

Answer 12

An application layer protocol which maps host names to their IP addresses

Question 13

ARP

Answer 13

Address Resolution Protocol. Used to map an IP address to a MAC address. Defined in RFC 826

Question 14

Ping

Answer 14

An Internet Control Message Protocol echo message and its reply, used to test network reachability