Chapter 8

Question 1

There are loads of reasons in favor of subnetting, including the following benefits: p213

Answer 1

Reduced network traffic
Optimized network performance
Simplified management
Facilitated spanning of large geographical distances

Question 2

is a 32-bit value that allows the recipient of IP packets to distinguish the network ID portion of the IP address from the host ID portion of the IP address. p214

Answer 2

Subnet Masks

Question 3

(CIDR)stands for what. p215

Answer 3

Classless Inter-Domain Routing (CIDR)

Question 4

It’s basically the method that Internet service providers (ISPs) use to allocate an amount of addresses to a company, a home—a customer. p215

Answer 4

Classless Inter-Domain Routing (CIDR)

Question 5

what are the five simple question when selecting a subnet. 218

Answer 5

How many subnets does the chosen subnet mask produce?
How many valid hosts per subnet are available?
What are the valid subnets?
What’s the broadcast address of each subnet?
What are the valid hosts in each subnet?

Question 6

Uses an Internet Control Message Protocol (ICMP) echo request and replies to test if a host IP stack is initialized and alive on the network. p236

Answer 6

Packet InterNet Groper (ping)

Question 7

what is a traceroute. p236

Answer 7

Displays the list of routers on a path to a network destination by using TTL time-outs and ICMP error messages. This command will not work from a DOS prompt.

Question 8

what is a tracert. p236

Answer 8

Same command as traceroute, but it’s a Microsoft Windows command and will not work on other devices, like a Cisco router or Unix box.

Question 9

Displays IP-to-MAC-address mappings on a Windows PC. p236

Answer 9

arp -a

Question 10

Used only from a DOS prompt. Shows you the PC network configuration. p236

Answer 10

ipconfig /all

Question 11

It allows you to take one larger network and break it into a bunch of smaller networks. p212

Answer 11

Subnetting

Question 12

Class A network.host.host.host p215

Answer 12

255.0.0.0

Question 13

Class B network.network.host.host p215

Answer 13

255.255.0.0

Question 14

Class C network.network.network.host p215

Answer 14

255.255.255.0

Question 15

(ISPs) stands for what. p215

Answer 15

Internet service providers

Question 16

When referring to a slash notation you need to count all the 1s bits to figure out your _______.

Answer 16

mask