Ch09 Solutions
Chapter 9
Connecting to and Setting Up a Network
Reviewing the Basics
1. How many bits are in a MAC address?
48 bits
2. How many bits are in an IPv4 IP address? In an IPv6 IP address?
32 bits, 128 bits
3. How does a client application identify a server application on another computer on the network? By a port number
4. What are IP addresses called that begin with 10, 172.16, or 192.168?
Private IP addresses
5. In what class is the IP address 185.75.255.10?
Class B
6. In what class is the IP address 193.200.30.5?
Class C
7. Describe the difference between public and private IP addresses. If a network is using private IP addresses, how can the computers on that network access the Internet?
Public IP addresses are licensed and authorized to use the Internet. Private IP addresses are not authorized or licensed to use the Internet. A computer with a private
IP address uses a NAT router to access the Internet.
8. Why is it unlikely that you will fi nd the IP address 192.168.250.10 on the Internet?
IP addresses that begin with 192.168 are private IP addresses.
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9. In Figure 15-9, the subnet mask is four notches tall and is considered a classless subnet mask for this network of sticks. How many notches tall would be a classful subnet mask for the same network?
A classful subnet mask for this network would be two notches tall because the first two notches of all sticks in the network are the same.
10. If no DHCP server is available when a computer confi gured for dynamic IP addressing connects to the network, what type of IP address is assigned to the computer?
Automatic private IP address (APIPA)
11. If a computer is found to have an IP address of 169.254.1.1, what can you assume about how it received that IP address?
The IP address was automatically assigned by Windows when it failed to lease an address from the DHCP server. The computer received an APIPA IP address.
12. What are the last 64 bits of a IPv6 IP address called? How are these bits used?
The Interface ID
Connecting to and Setting Up a Network
Reviewing the Basics
1. How many bits are in a MAC address?
48 bits
2. How many bits are in an IPv4 IP address? In an IPv6 IP address?
32 bits, 128 bits
3. How does a client application identify a server application on another computer on the network? By a port number
4. What are IP addresses called that begin with 10, 172.16, or 192.168?
Private IP addresses
5. In what class is the IP address 185.75.255.10?
Class B
6. In what class is the IP address 193.200.30.5?
Class C
7. Describe the difference between public and private IP addresses. If a network is using private IP addresses, how can the computers on that network access the Internet?
Public IP addresses are licensed and authorized to use the Internet. Private IP addresses are not authorized or licensed to use the Internet. A computer with a private
IP address uses a NAT router to access the Internet.
8. Why is it unlikely that you will fi nd the IP address 192.168.250.10 on the Internet?
IP addresses that begin with 192.168 are private IP addresses.
1
9. In Figure 15-9, the subnet mask is four notches tall and is considered a classless subnet mask for this network of sticks. How many notches tall would be a classful subnet mask for the same network?
A classful subnet mask for this network would be two notches tall because the first two notches of all sticks in the network are the same.
10. If no DHCP server is available when a computer confi gured for dynamic IP addressing connects to the network, what type of IP address is assigned to the computer?
Automatic private IP address (APIPA)
11. If a computer is found to have an IP address of 169.254.1.1, what can you assume about how it received that IP address?
The IP address was automatically assigned by Windows when it failed to lease an address from the DHCP server. The computer received an APIPA IP address.
12. What are the last 64 bits of a IPv6 IP address called? How are these bits used?
The Interface ID