Module 11-13 Review

What is the prefix length notation for the subnet mask 255.255.255.224?

/27

Consider the following range of addresses:2001:0DB8:BC15:00A0:0000::2001:0DB8:BC15:00A1:0000::2001:0DB8:BC15:00A2:0000::...2001:0DB8:BC15:00AF:0000::The prefix-length for the range of addresses is

/60

How many host addresses are available on the network with a subnet mask of 255.255.252.0?

1022

What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?

2001:DB8:BC15:A The network portion, or prefix, of an IPv6 address is identified through the prefix length. A /64 prefix length indicates that the first 64 bits of the IPv6 address is the network portion. Hence the prefix is 2001:DB8:BC15:A.

Which address prefix range is reserved for IPv4 multicast?

224.0.0.0 - 239.255.255.255

A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

255.255.255.128

How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?

3

A network administrator has received the IPv6 prefix 2001:DB8::/48 for subnetting. Assuming the administrator does not subnet into the interface ID portion of the address space, how many subnets can the administrator create from the /48 prefix?

65536

A message is sent to all hosts on a remote network. Which type of message is it?

Directed broadcast

Which IPv6 prefix is reserved for communication between devices on the same link?

FE80::/10

Which protocol is used by the traceroute command to send and receive echo-requests and echo-replies?

ICMP

Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?

ICMPv6

What is the range of valid IPv6 link-local unicast addresses?

IPv6 LLAs are in the fe80::/10 range. The /10 indicates that the first 10 bits are 1111 1110 10xx xxxx. The first hextet has a range of 1111 1110 1000 0000 (fe80) to 1111 1110 1011 1111 (febf).

Three methods allow IPv6 and IPv4 to co-exist. Match each method with its description:translation

IPv6 packets are converted into IPv4 packets, and vice versa.

Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?

SLAAC

Experimental addresses

The addresses in the block 240.0.0.0 to 255.255.255.254

What are the rules for compressing an IPv6 address?

The rules for reducing the notation of IPv6 addresses are: 1. Omit any leading 0s (zeros) in any hextet. 2. Replace any single, contiguous string of one or more 16-bit hextets consisting of all zeros with a double colon (::) . 3. The double colon (::) can only be used once within an address.

A host is transmitting a multicast. Which host or hosts will receive it?

a specially defined group of hosts

A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 3 . What does this code represent?

address unreachable

An IPv6 enabled device sends a data packet with the destination address of FF02::1. What is the target of this packet?​

all IPv6 enabled devices on the local link​ or network

Link-Local addresses

assigned automatically by the OS environment and are located in the block 169.254.0.0/16

Loopback addresses

belong to the block 127.0.0.0/8

TEST-NET addresses

belong to the range 192.0.2.0/24

A user issues a ping 10.10.14.67 command and receives a response that includes a code of 0 . What does this code represent?

network unreachable

Private addresses

ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16

What source IP address does a router use by default when the traceroute command is issued?

the IP address of the outbound interface

Which ICMPv6 message is sent when the IPv6 hop limit field of a packet is decremented to zero and the packet cannot be forwarded?

time exceeded

An administrator wants to create four subnetworks from the network address 192.168.1.0/24. What is the network address and subnet mask of the second useable subnet?

subnetwork 192.168.1.64subnet mask 255.255.255.192

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?

the MAC address of the IPv6 enabled interface

What are the ranges for valid public addresses

10.0.0.0 - 10.255.255.255 172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255

What three blocks of addresses are defined by RFC 1918 for private network use?

10.0.0.0/8 172.16.0.0/12 192.168.0.0/16

How many host addresses are available on the /26 network?

62

What are two types of IPv6 unicast addresses?

Loopback link-local

Three methods allow IPv6 and IPv4 to co-exist. Match each method with its description: dual-stack

The IPv4 packets and IPv6 packets coexist in the same network.

A high school in New York (school A) is using videoconferencing technology to establish student interactions with another high school (school B) in Russia. The videoconferencing is conducted between two end devices through the Internet. The network administrator of school A configures the end device with the IP address 209.165.201.10. The administrator sends a request for the IP address for the end device in school B and the response is 192.168.25.10. Neither school is using a VPN. The administrator knows immediately that this IP will not work. Why?

This is a private IP address

A host is transmitting a broadcast. Which host or hosts will receive it?

all hosts in the same subnet

What type of IPv6 address is FE80::1?

link-local

What is the usable number of host IP addresses on a network that has a /26 mask?

62

Which type of IPv6 address refers to any unicast address that is assigned to multiple hosts?

anycast

A user issues a ping 192.135.250.103 command and receives a response that includes a code of 1 . What does this code represent?

host unreachable

A host is transmitting a unicast. Which host or hosts will receive it?

one specific host

A technician uses the ping 127.0.0.1 command. What is the technician testing?

the TCP/IP stack on a network host

What is the purpose of ICMP messages?

to provide feedback of IP packet transmissions

Three methods allow IPv6 and IPv4 to co-exist. Match each method with its description: tunneling

The IPv6 packet is transported inside an IPv4 packet.

A user issues a ping 2001:db8:FACE:39::10 command and receives a response that includes a code of 2 . What does this code represent?

beyond scope of the source address

A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 4 . What does this code represent?

port unreachable

A user executes a traceroute over IPv6. At what point would a router in the path to the destination device drop the packet?

when the value of the Hop Limit field reaches zero