CCNA Version 7 11-13
when the value of the Hop Limit field reaches zero
A user executes a traceroute over IPv6. At what point would a router in the path to the destination device drop the packet?
network unreachable
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?
beyond scope of the source address
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 2001:db8:FACE:39::10 command and receives a response that includes a code of 2. What does this code represent?
address unreachable
A user issues a ping 2001:db8:FACE:39::10 command and receives a response that includes a code of 3. What does this code represent?
address unreachable
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?
port unreachable
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?
all IPv6 enabled devices on the local link or network*
An IPv6 enabled device sends a data packet with the destination address of FF02::1. What is the target of this packet?
all hosts in the same subnet
A host is transmitting a broadcast. Which host or hosts will receive it?
62
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
Network A needs to use 192.168.0.128 /25, which yields 128 host addresses. Network B needs to use 192.168.0.0 /26, which yields 64 host addresses. Network C needs to use 192.168.0.96 /27, which yields 32 host addresses. Network D needs to use 192.168.0.80/30, which yields 4 host addresses.
Match the network with the correct IP address and prefix that will satisfy the usable host addressing requirements for each network.
anycast
Which type of IPv6 address refers to any unicast address that is assigned to multiple hosts?
one specific host
A host is transmitting a unicast. Which host or hosts will receive it?
subnetwork 192.168.1.64 subnet mask 255.255.255.192
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?
2001:0DB8:BC15:00AF:0000:: The prefix-length for the range of addresses is /60 . Explanation: All the addresses have the part 2001:0DB8:BC15:00A in common. Each number or letter in the address represents 4 bits, so the prefix-length is /60.
Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000::
62 A /26 prefix gives 6 host bits, which provides a total of 64 addresses, because 26 = 64. Subtracting the network and broadcast addresses leaves 62 usable host addresses.
How many host addresses are available on the 192.168.10.128/26 network?
224.0.0.0 - 239.255.255.255
Which address prefix range is reserved for IPv4 multicast?
198.133.219.17 128.107.12.117 64.104.78.227 The ranges of private IPv4 addresses are as folllows: 10.0.0.0 - 10.255.255.255 172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255
Which three addresses are valid public addresses?
fe80:9ea:0:2200::fe0:290
Which is the compressed format of the IPv6 address fe80:09ea:0000:2200:0000:0000:0fe0:0290?
192.168.1.64/27 192.168.1.96/28
A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that?
host unreachable
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?
4
A network administrator subnets the 192.168.10.0/24 network into subnets with /26 masks. How many equal-sized subnets are created?
FF02::1:FFAE:F85F is a solicited node multicast address. 2001:DB8::BAF:3F57:FE94 is a global unicast address. FF02::1 is the all node multicast address. Packets sent to this address will be received by all IPv6 hosts on the local link. ::1 is the IPv6 loopback address. There are no examples of link local or unique local addresses provided.
Match the IPv6 address with the IPv6 address type.
62 A /26 mask is the same as 255.255.255.192. The mask leaves 6 host bits. With 6 host bits, 64 IP addresses are possible. One address represents the subnet number and one address represents the broadcast address, which means that 62 addresses can then be used to assign to network devices.
What is the usable number of host IP addresses on a network that has a /26 mask?
16 Because only one hexadecimal character is used to represent the subnet, that one character can represent 16 different values 0 through F.
A company is deploying an IPv6 addressing scheme for its network. The company design document indicates that the subnet portion of the IPv6 addresses is used for the new hierarchical network design, with the site subsection to represent multiple geographical sites of the company, the sub-site section to represent multiple campuses at each site, and the subnet section to indicate each network segment separated by routers. With such a scheme, what is the maximum number of subnets achieved per sub-site?
This is a private IP address.
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?
a specially defined group of hosts
A host is transmitting a multicast. Which host or hosts will receive it?
directed broadcast A directed broadcast is a message sent to all hosts on a specific network. It is useful for sending a broadcast to all hosts on a nonlocal network. A multicast message is a message sent to a selected group of hosts that are part of a subscribing multicast group. A limited broadcast is used for a communication that is limited to the hosts on the local network. A unicast message is a message sent from one host to another.
A message is sent to all hosts on a remote network. Which type of message is it?
65536 With a network prefix of 48, there will be 16 bits available for subnetting because the interface ID starts at bit 64. Sixteen bits will yield 65536 subnets.
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?
255.255.255.128 The subnet mask of 255.255.255.0 has 8 host bits. The mask of 255.255.255.128 results in 7 host bits. The mask of 255.255.255.224 has 5 host bits. Finally, 255.255.255.240 represents 4 host bits.
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?
the TCP/IP stack on a network host
A technician uses the ping 127.0.0.1 command. What is the technician testing?
R1
An administrator is trying to troubleshoot connectivity between PC1 and PC2 and uses the tracert command from PC1 to do it. Based on the displayed output, where should the administrator begin troubleshooting?
172.16.19.255 The 172.16.16.0/22 network has 22 bits in the network portion and 10 bits in the host portion. Converting the network address to binary yields a subnet mask of 255.255.252.0. The range of addresses in this network will end with the last address available before 172.16.20.0. Valid host addresses for this network range from 172.16.16.1-172.16.19.254, making 172.16.19.255 the broadcast address.
An administrator must send a message to everyone on the router A network. What is the broadcast address for network 172.16.16.0/22?
10.16.10.64/27* Addresses 10.16.10.0 through 10.16.10.63 are taken for the leftmost network. Addresses 10.16.10.192 through 10.16.10.207 are used by the center network.The address space from 208-255 assumes a /28 mask, which does not allow enough host bits to accommodate 25 host addresses.The address ranges that are available include 10.16.10.64/26 and10.16.10.128/26. To accommodate 25 hosts, 5 host bits are needed, so a /27 mask is necessary. Four possible /27 subnets could be created from the available addresses between 10.16.10.64 and 10.16.10.191: 10.16.10.64/27 10.16.10.96/27 10.16.10.128/27 10.16.10.160/27
Considering the addresses already used and having to remain within the 10.16.10.0/24 network range, which subnet address could be assigned to the network containing 25 hosts?
2001:db8:0:f000::/52 Prefix 2001:db8::/48 has 48 network bits. If we subnet to a /52, we are moving the network boundary four bits to the right and creating 16 subnets. The first subnet is 2001:db8::/52 the last subnet is 2001:db8:0:f000::/52.
Given IPv6 address prefix 2001:db8::/48, what will be the last subnet that is created if the subnet prefix is changed to /52?
three Each network that is directly connected to an interface on a router requires its own subnet. The formula 2n, where n is the number of bits borrowed, is used to calculate the available number of subnets when borrowing a specific number of bits.
How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?
1022 A mask of 255.255.252.0 is equal to a prefix of /22. A /22 prefix provides 22 bits for the network portion and leaves 10 bits for the host portion. The 10 bits in the host portion will provide 1022 usable IP addresses (210 - 2 = 1022).
How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
Link-Local addresses are assigned automatically by the OS environment and are located in the block 169.254.0.0/16. The private addresses ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. TEST-NET addresses belong to the range 192.0.2.0/24. The addresses in the block 240.0.0.0 to 255.255.255.254 are reserved as experimental addresses. Loopback addresses belong to the block 127.0.0.0/8.
Match each description with an appropriate IP address.
3FFE:1044:0:0:AB::57 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.
Which of these addresses is the shortest abbreviation for the IP address: 3FFE:1044:0000:0000:00AB:0000:0000:0057?
loopback link-local Multicast, anycast, and unicast are types of IPv6 addresses. There is no broadcast address in IPv6. Loopback and link-local are specific types of unicast addresses.
What are two types of IPv6 unicast addresses?
2001:DB8:BC15:A
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
/27 The binary format for 255.255.255.224 is 11111111.11111111.11111111.11100000. The prefix length is the number of consecutive 1s in the subnet mask. Therefore, the prefix length is /27
What is the prefix length notation for the subnet mask 255.255.255.224?
to provide feedback of IP packet transmissions The purpose of ICMP messages is to provide feedback about issues that are related to the processing of IP packets.
What is the purpose of ICMP messages?
the MAC address of the IPv6 enabled interface The EUI-64 process uses the MAC address of an interface to construct an interface ID (IID). Because the MAC address is only 48 bits in length, 16 additional bits (FF:FE) must be added to the MAC address to create the full 64-bit interface ID.
What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?
the IP address of the outbound interface When sending an echo request message, a router will use the IP address of the exit interface as the source IP address. This default behavior can be changed by using an extended ping and specifying a specific source IP address.
What source IP address does a router use by default when the traceroute command is issued?
10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 RFC 1918, Address Allocation for Private Internets, defines three blocks of IPv4 address for private networks that should not be routable on the public Internet. 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
What three blocks of addresses are defined by RFC 1918 for private network use?
link-local
What type of IPv6 address is FE80::1?
time exceded
Which ICMPv6 message is sent when the IPv6 hop limit field of a packet is decremented to zero and the packet cannot be forwarded?
FE80::/10 IPv6 link-local unicast addresses are in the FE80::/10 prefix range and are not routable. They are used only for communications between devices on the same link.
Which IPv6 prefix is reserved for communication between devices on the same link?
FE80::1:4545:6578:ABC1 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).
Which address is a valid IPv6 link-local unicast address?
2001:db8::a0b0:8:1
Which is the compressed format of the IPv6 address 2001:0db8:0000:0000:0000:a0b0:0008:0001?
2001:db8::ab8:1:0:1000
Which is the compressed format of the IPv6 address 2001:0db8:0000:0000:0ab8:0001:0000:1000?
2002:42:10:c400::909
Which is the compressed format of the IPv6 address 2002:0042:0010:c400:0000:0000:0000:0909?
2002:420:c4:1008:25:190::990
Which is the compressed format of the IPv6 address 2002:0420:00c4:1008:0025:0190:0000:0990?
fe80::220:b3f:f0e0:29
Which is the compressed format of the IPv6 address fe80:0000:0000:0000:0220:0b3f:f0e0:0029?
ICMP Traceroute uses the ICMP (Internet Control Message Protocol) to send and receive echo-request and echo-reply messages.
Which protocol is used by the traceroute command to send and receive echo-requests and echo-replies?
ICMPv6 SLAAC uses ICMPv6 messages when dynamically assigning an IPv6 address to a host. DHCPv6 is an alternate method of assigning an IPv6 addresses to a host. ARPv6 does not exist. Neighbor Discovery Protocol (NDP) provides the functionality of ARP for IPv6 networks. UDP is the transport layer protocol used by DHCPv6.
Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?
SLAAC Using stateless address autoconfiguration (SLAAC), a PC can solicit a router and receive the prefix length of the network. From this information the PC can then create its own IPv6 global unicast address.
Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?
255.255.255.224
Which subnet mask would be used if 5 host bits are available?
192.168.1.64/26 For the subnet of 192.168.1.64/26, there are 6 bits for host addresses, yielding 64 possible addresses. However, the first and last subnets are the network and broadcast addresses for this subnet. Therefore, the range of host addresses for this subnet is 192.168.1.65 to 192.168.1.126. The other subnets do not contain the address 192.168.1.96 as a valid host address.
Which subnet would include the address 192.168.1.96 as a usable host address?
