Networking Chapter 7

sequence number

What does the Transport layer use to make sure that a message is reassembled correctly on the receiving device? -source port number -window Size -destination port number -sequence number

window size

What information would you find in the header of a Transport layer PDU? -destination IP address -cyclic redundancy check -source MAC address -window size

It is the name given to the unit of information used by each layer

What is a PDU? -It is an Application layer protocol that handles delivery of messages. -It is a unit of measurement for the maximum amount of data that can be transferred. -It is the name given to the unit of information used by each layer. -It is a Network layer protocol that handles path determination x

802.3

What is the IEEE standard that governs all forms of Ethernet media and interfaces? -802.11 -802.3 -802.15 -802.2

6

What layer is responsible for making sure that the data that it sends and receives is in a format that the receiving and sending computers can understand? -7 -6 -5 -4

802.11

Which is the IEEE standard that sets the standards for wireless networking? -802.16 -802.3 -802.15 -802.11

Network

Which layer is responsible for determining the best path a packet should travel across an internetwork? -Network -Transport -Session -Data Link

1

Which layer is responsible for the encoding of signals? -3 -1 -5 -7

Presentation

Which layer of the OSI model is responsible for encryption and decryption? -Application -Presentation -Session -Transport

Network layer device

You are working at the help desk and you get a message that a user cannot access the Internet. You open a command prompt, ping the workstation's IP address, and get a response. You ask the user to try the Internet again. He does so with the same result— no connection. Which type of device is most likely to be the problem? -Physical layer device -Data Link layer device -Network layer device -Presentation layer device

Data

Application -Data -Segment -Packet -Frame

encapsulation

At each layer of the OSI model, data is appended to the original message and then sent on to the next lower layer. What is this process called? -encapsulation -deencapsulation -packetization -checkpointing

Data Link

At what layer do NICs operate? -Transport -Data Link -Physical -Network

Frame

Data Link -Data -Segment -Packet -Frame

Packet

Internet -Data -Segment -Packet -Frame

True

One of the problems that can occur in the Network layer is the incorrect configuration of a hosts IP address. True or False

False

The Network layer communicates with the Data Link layer and the Session layer. True or False

False

The Physical layer has been divided into two sublayers, called the LLC sublayer and the MAC sublayer. True or False

True

The Transport layer is the same in both the OSI model and the TCP/IP model. True or False

MTU

The Transport layer segments data into smaller chunks, the size of which is determined by which of the following? -MTU -LLC -PDU -TCP

True

The maximum transmission unit for Ethernet is 1518 bytes. True or False

Segment

Transport -Data -Segment -Packet -Frame