Chapter 6 Flashcards
(19 cards)
Which IP addresses are network addresses? (Choose two.)
A. 64.104.3.7 /28
B. 192.168.12.64 /26
C. 192.135.12.191 /26
D. 198.18.12.16 /28
E. 209.165.200.254 /27
F. 220.12.12.33/27
B, D. 192.168.12.64 /26 and 198.18.12.16 /28 are network addresses.
A network administrator is building a network for a small business that has 22 hosts.
The ISP has assigned only one Internet routable IP address. Which IP address block
can the network administrator use to address the network?
A. 10.11.12.16 /28
B. 172.31.255.128 /27
C. 192.168.1.0 /28
D. 209.165.202.128 /27
B. 172.31.255.128 /27
What subnet mask would be used with the hosts in the 128.107.176.0 /22 network?
A. 255.0.0.0
B. 255.248.0.0
C. 255.255.252.0
D. 255.255.255.0
E. 255.255.255.252
C. 255.255.252.0
You have been assigned the address block 10.255.255.224 /28 to create the network addresses for point-to-point WAN links. How many of these WANs can you support with this address block?
A. 1
B. 4
C. 7
D. 14
B. The four networks are .224, .228, .232, and .236.
What defines an IPv4 logical network?
Hosts with the same network portion of their IPv4 address.
Name and state the purpose of the three types of IPv4 addresses
The three types of IPv4 addresses are
■ Network address: The address by which you refer to the network
■ Broadcast address: A special address used to send data to all hosts in the network
■ Host addresses: The addresses assigned to the end devices in the network
A network administrator needs to create a new network that has 14 computers and two router interfaces. What subnet mask will provide the appropriate number of IPv4 addresses for this network with minimal wasted addresses?
A. 255.255.255.128
B. 255.255.255.192
C. 255.255.255.224
D. 255.255.255.240
E. 255.255.255.248
F. 255.255.255.252
C. 255.255.255.224 provides the 16 addresses required. .224 will provide 30. .240 will
provide only 14.
What distinguishes each of the three types of IPv4 addresses?
The three types of IPv4 addresses are
■ Network address: Lowest address in the network 0 for each host bit in the host
portion of the address.
■ Host address: Host bits are a unique mix of 1s and 0s within a network.
■ Broadcast address: Uses the highest address in the network range. The host
portion is all 1s.
List the three forms of IPv4 communication.
Following are the three forms of IPv4 communication:
■ Unicast: The process of sending a packet from one host to an individual host
■ Broadcast: The process of sending a packet from one host to all hosts in the network
■ Multicast: The process of sending a packet from one host to a selected group of
hosts
List the purpose of having specified ranges of IPv4 addresses for public and private use
Specified private addresses allow network administrators to allocate addresses to those
hosts that do not need to access the Internet.
A host in the south branch cannot access the server with the address 192.168.254.222 /224. While examining the host, you determine that its IPv4 address is 169.254.11.15/16. What is the apparent problem?
A. The host is using a link-local address.
B. The server is using an invalid subnet mask.
C. The host has been assigned a broadcast address.
D. The server thinks that the host is on the logical network with the server.
A. The host is using a link-local address. Link-local addresses should not be routed.
List three reasons for planning and documenting IPv4 addresses.
The allocation of addresses inside the networks should be planned and documented for
the following purposes:
■ Preventing duplication of addresses
■ Providing and controlling access
■ Monitoring security and performance
Cite examples where network administrators should statically assign IPv4 addresses
Administrators should statically assign addresses to servers, printers, LAN gateway
addresses on routers, management addresses on network devices such as switches, and
wireless access points.
What was the primary motivation for the development of IPv6?
Running out of IPv4 addresses is the primary motivation for developing IPv6.
What is the purpose of the subnet mask in IPv4 addressing?
Network devices use the subnet mask to determine the network or subnet address of an
IP address that the device is processing.
List factors to consider when planning an IPv4 addressing scheme.
Networks are subnetted to overcome issues with location, size, and control. In designing the addressing, consider these factors for grouping the hosts:
■ Grouping based on common geographic location
■ Grouping hosts used for specific purposes
■ Grouping based on ownership
What are three tests that use the ping utility to test and verify the operation of a host?
Three tests that use the ping utility are
■ Ping 127.0.0.1: Loopback test to test IP operation
■ Ping the host gateway address or another host on the same network: To determine
communication over the local network
■ Ping a host on a remote network: Test device default gateway and beyond
What are the reserved and special IPv4 addresses, and how are they used?
The reserved and special IPv4 addresses are
1. Multicast addresses
2. Private addresses
3. Default route
4. Loopback
5. Link-local addresses
6. Test-net addresses
Why is ICMPv4 an important protocol to have operating with IPv4? What are the ICMP message types?
IPv4 is an unreliable best-effort protocol. ICMPv4 provides a means for network problems such as dropped packets or congestion to be reported to the source network or
host. Messages include
■ Host Conformation
■ Unreachable Destination or Service
■ Time Exceeded
■ Route Redirection
■ Source Quench
