Modules 11, 12, & 13

A network administrator is testing network connectivity by issuing the ping command on a router. Which symbol will be displayed to indicate that a time expired during the wait for an ICMP echo reply message?

.

What block are TEST-NET addresses in?

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

What block are private addresses in?

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

Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. What is the network address of Host-A?

10.5.4.0

Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. What IPv4 address would be on the same network as Host-A?

10.5.4.1

Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. What IPv4 address would be on the same network as Host-A?

10.5.4.99

Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the following address: 2001:db8:cafe:1111:2222:3333:4444:5555

1111

Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. What IPv4 address would be on the same network as Host-A?

172.16.4.99

What subnet mask is represented by the slash notation /20?

255.255.255.192

A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.224. How many usable host addresses will this subnet provide?​

30.

How many usable IP addresses are available on the 192.168.1.0/27 network?

30.

Given a /32 Global Routing Prefix and a /64 prefix, how many bits would be allocated for the Subnet ID?

32

A network administrator subnets the 192.168.10.0/24 network into subnets with /26 masks. How many equal-sized subnets are created?

4.

What is a part of an IPv6 global unicast address?

A global routing prefix that is used to identify the network portion of the address that has been provided by an ISP.

What is a part of an IPv6 global unicast address?

A subnet ID that is used to identify networks inside of the local enterprise site.

What does . indicate in a ping command?

A time expired while waiting for an ICMP echo reply message.

What does U indicate in a ping command?

An ICMP message of unreachability was received.

What statement is correct about private IPv4 addresses?

Any organization (home, school, office, company) can use the 10.0.0.0/8 address.

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

Anycast.

Which address type is not supported in IPv6?

Broadcast.

What is the most important motivating factor for moving to IPv6?

Depletion of IPv4 addresses.

What type of ICMP messages are common to both ICMPv4 and ICMPv6?

Destination or Service Unreachable.

Which of the following techniques use native IPv6 connectivity?

Dual stack.

What is a method that a device can use to generate its own IPv6 interface ID?

EUI-64

What field content is used by ICMPv6 to determine that a packet has expired?

Hop Limit field.

Which protocol is used by IPv4 and IPv6 to provide error messaging?

ICMP.

Which protocol provides feedback from the destination host to the source host about errors in packet delivery?

ICMP.

What is indicated by a successful ping to the ::1 IPv6 address?

IP is properly installed on the host.

Which dynamic addressing method for GUAs is the one where devices get their IPv6 configuration in a RA message and request DNS information from a DHCPv6 server?

Method 2: SLAAC and Stateless DHCPv6

Which dynamic addressing method for GUAs is the one where devices rely solely on a DHCPv6 server for their addressing information?

Method 3: Stateful DHCPv6

What message is sent by a host to check the uniqueness of an IPv6 address before using that address?

Neighbor solicitation.

Which utility uses the Internet Control Messaging Protocol (ICMP)?

Ping.

What statement is correct about private IPv4 addresses?

Private IPv4 addresses are assigned to devices within an organization's intranet (internal network).

10.0.0.0/8 is what address range?

Private, 10.0.0.0 - 10.255.255.255.

Which type of ICMPv6 message would a host send to acquire an IPv6 configuration when booting up?

Router Solicitation (RS) message.

What situation is the result of excessive broadcast traffic?

Slow device operations.

A user calls to report that a PC cannot access the internet. The network technician asks the user to issue the command ping 127.0.0.1 in a command prompt window. The user reports that the result is four positive replies. What conclusion can be drawn based on this connectivity test?

The TCP/IP implementation is functional.

What can be determined by using the ping command?

The average time it takes a packet to reach the destination and for the response to return to the source.

What can be determined by using the ping command?

The destination device is reachable through the network.

What does ! indicate in a ping command?

The receipt of an ICMP echo reply message.

What is a function of the tracert command that differs from the ping command when they are used on a workstation?

The tracert command shows the information of routers in the path.

What type of ICMP messages are common to both ICMPv4 and ICMPv6?

Time exceeded.

Which ICMP message is used by the traceroute utility during the process of finding the path between two end hosts?

Time exceeded.

What statement is correct about public IPv4 addresses?

To access a device over the internet, the destination IPv4 address must be a public address.

What is the minimum configuration for a router interface that is enabled for IPv6?

To have a link-local IPv6 address.

A user who is unable to connect to the file server contacts the help desk. The helpdesk technician asks the user to ping the IP address of the default gateway that is configured on the workstation. What is the purpose for this ping command?

To test that the hst has the capability to reach hosts on other networks.

True or False: 4 out of 5 RIRs no longer have enough IPv4 addresses to allocate to customers on a regular basis.

True.

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

directed broadcast

Which command can be used to test connectivity between two devices using echo request and echo reply messages?

ping

A network administrator can successfully ping the server at www.cisco.com, but cannot ping the company web server located at an ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?

traceroute

A technician is troubleshooting a network where it is suspected that a defective node in the network path is causing packets to be dropped. The technician only has the IP address of the end point device and does not have any details of the intermediate devices. What command can the technician use to identify the faulty node?

tracert

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.

What is a part of an IPv6 global unicast address?

An interface ID that is used to identify the local host on the network.

What type of IPv6 address begins with fe80?

LLA.

Which type of IPv6 unicast address is not routable between networks?

LLA.

Which type of IPv6 address is not routable and used only for communication on a single subnet?

Link-local address.

At a minimum, which address is required on IPv6-enabled interfaces?

Link-local.

What type of IPv6 address is FE80::1?

Link-local.

What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?

Link-local.

Which dynamic addressing method for GUAs is the one where devices rely solely on the contents of the RA message for their addressing information?

Method 1: SLAAC

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 Each number or letter in the address represents 4 bits.

What is the recommended prefix length for most IPv6 subnets?

/64

/17 =?

11111111.11111111.10000000.00000000 (2 subnets) (32,766 hosts).

/20 =?

11111111.11111111.11100000.00000000 (8 subnets) (4,094 hosts).

/24 =?

11111111.11111111.11111111.00000000 (256 subnets) (254 hosts).

/30 =?

11111111.11111111.11111111.11111100 (16,384 subnets) (2 hosts).

What block are loopback addresses in?

127.0.0.0/8

If a network device has a mask of /28, how many IP addresses are available for hosts on this network?

14

Your organization is issued the IPv6 prefix of 2001:db8:130f::/48 by your service provider. With this prefix, how many bits are available for your organization to create /64 subnetworks if interface ID bits are not borrowed?

16.

What block are Link-Local addresses in?

169.254.0.0/16

Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. What is the network address of Host-A?

172.16.0.0

Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. What IPv4 address would be on the same network as Host-A?

172.16.0.1

PCA - Switch1 (172.16.16.0/22) - RouterA - RouterB - Switch2 - PCB 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?

172.16.19.255

Host-A has the IPv4 address and subnet mask 192.168.1.50 255.255.255.0. What IPv4 address would be on the same network as Host-A?

192.168.1.1

Host-A has the IPv4 address and subnet mask 192.168.1.50 255.255.255.0. What IPv4 address would be on the same network as Host-A?

192.168.1.100

What is the purpose of the command ping ::1?

It tests the internal configuration of an IPv6 host.

What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?

2001:DB8:0:AB00::1234

What is the network address for the IPv6 address 2001:DB8:AA04:B5::1/64?

2001:DB8:AA04:B5::/64

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

2001:DB8:BC15:A

What is the prefix associated with the IPv6 address 2001:DB8:D15:EA:CC44::1/64?

2001:DB8:D15:EA::/64

What is the most compressed representation of the IPv6 address 2001:0db8:0000:abcd:0000:0000:0000:0001?

2001:db8:0:abcd::1

Which address prefix range is reserved for IPv4 multicast?

224.0.0.0 - 239.255.255.255

What block are experimental addresses in?

240.0.0.0 to 255.255.255.254

Which subnet mask would be used if 5 host bits are available?

255.255.255.224

Which subnet mask would be used if exactly 4 host bits are available?

255.255.255.240

How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

62 hosts.

If a network device has a mask of /26, how many IP addresses are available for hosts on this network?

62.

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

What is the interface ID of the IPv6 address 2001:DB8::1000:A9CD:47FF:FE57:FE94/64?

A9CD:47FF:FE57:FE94

Which IPv6 network prefix is only intended for local links and can not be routed?

FE80::/10

True or False. RA messages are sent to all IPv6 routers by hosts requesting addressing information.

False.

True or False: The Subnet ID field in an GUA must borrow bits from the interface ID.

False.

Which part of a GUA is assigned by the ISP?

Global Routing Prefix.

What does the IP address 172.17.4.250/24 represent?

Host address.

Which two parts are components of an IPv4 address?

Host portion and network portion.

172.16.0.0/12 is what address range?

Private, 172.16.0.0 - 172.31.255.255.

192.168.0.0/16 is what address range?

Private, 192.168.0.0 - 192.168.255.255.

Public or private? 10.55.3.168

Private.

Public or private? 172.16.30.30

Private.

Public or private? 172.16.35.2

Private.

Public or private? 192.168.11.5

Private.

Public or private? 192.168.3.5

Private.

What statement is correct about public IPv4 addresses?

Public IPv4 address exhaustion is a reason why there are private IPv4 address and why organizations are transitioning to IPv6.

Public or private? 192.0.3.15

Public.

Public or private? 209.165.201.30

Public.

PC1 (192.168.1.1) - SW1 - R1 - R2 - SW2 - PC2 (10.1.0.2) tracert 10.1.0.2 - Request times out after 192.168.1.254 (first hop).

R1.

Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?

RIRs.

What is a method that a device can use to generate its own IPv6 interface ID?

Randomly generated.

Which devices will not forward an IPv4 broadcast packet by default?

Router.

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

SLAAC.

What situation is the result of excessive broadcast traffic?

Slow network operations.

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.

Which field in an IPv6 GUA is used for subnetting?

Subnet ID.

Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements.

What is the purpose of the subnet mask in conjunction with an IP address?

To determine the subnet to which the host belongs.

Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?

To identify the network address of the destination network.

True or False? IPv6 was designed with subnetting in mind.

True.

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 192.168.1.64 subnet mask 255.255.255.192