Final Exam Study

What two ICMPv6 message types must be permitted through IPv6 access control lists to allow resolution of Layer 3 addresses to Layer 2 MAC addresses?

• neighbor solicitations

• neighbor advertisements

• echo requests

• router solicitations

• echo replies

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

• FECO::/10

• FDEE::/7

• FE80::/10

• FF00::/8

What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 when the interface ID is generated by using the EUI-64 process?

• 0C6F:65FF:FEC2:BDF8

• 1E6F:65FF:FEC2:BDF8

• C16F:65FF:FEC2:BDF8

• 106F:65FF:FEC2:BDF8

An organization is assigned an IPv6 address block of 2001:db8:0:ca00::/56. How many subnets can be created without using bits in the interface ID space?

• 256

• 512

• 1024

• 4096

If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?

• 172.168.10.99

• DD:DD:DD:DD:DD:DD

• BB:BB:BB:BB:BB:BB

• CC:CC:CC:CC:CC:CC

• 172.168.10.65

When a switch configuration includes a user-defined error threshold on a per-port basis, to which switching method will the switch revert when the error threshold is reached?

• Store-and-forward switching

• Cut-through switching

• Fragment-free switching

• Adaptive switching

Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved?

• Destination IP addresses in a packet header remain constant along the entire path to a target host.

• Destination MAC addresses will never change in a frame that goes across seven routers.

• Every time a frame is encapsulated with a new destination MAC address, a new destination IP address is needed.

• Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.

• A packet that has crossed four routers has changed the destination IP address four times.

What is one main characteristic of the data link layer?

• It generates the electrical or optical signals that represent the 1 and 0 on the media.

• It converts a stream of data bits into a predefined code.

• It shields the upper layer protocol from being aware of the physical medium to be used in the communication.

• It accepts Layer 3 packets and decides the path by which to forward the packet to a remote network.

What are three characteristics of the CSMA/CD process?

• A device listens and waits until the media is not busy before transmitting.

• After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.

• All of the devices on a segment see data that passes on the network medium.

• The device with the electronic token is the only one that can transmit after a collision.

• A jam signal indicates that the collision has cleared and the media is not busy.

What are two primary responsibilities of the Ethernet MAC sublayer?

• error detection

• frame delimiting

• accessing the media

• data encapsulation

• logical addressing