Chapter 1: Network Models

Question 1

Where does a hub send data? 
A. Only to the receiving system
B. Only to the sending system
C. To all the systems connected to the hub
D. Only to the server

Answer 1

C. Data comes into a hub through one wire and is then sent out through all the other wires. A hub sends data to all the systems connected to it.

Question 2

What uniquely identifies every NIC? 
A. IP address
B. Media access control address
C. ISO number
D. Packet ID number

Answer 2

B. The unique identifier on a network interface card is called the media access control (MAC) address.

Question 3

What Windows utility do you use to find the MAC address for a system?
A. ipconfig /all
B. ipcfg /all
C. ping
D. mac

Answer 3

A. All versions of Windows use ipconfig /all from the command line to determine the MAC address.

Question 4

A MAC address is known as a(n)\_\_\_\_\_\_\_\_\_ address.
A. IP
B. logical
C. physical
D. OEM

Answer 4

C. The MAC address is the physical address.

Question 5

A NIC sends data in discrete chunks called \_\_\_\_\_\_\_.
A. segments
B. sections
C. frames
D. layers

Answer 5

C. Data is sent in discrete chunks called frames. Networks use frames to keep any one NIC from hogging the wire.

Question 6

Which MAC address begins a frame?
A. Receiving system
B. Sending system
C. Network
D. Router

Answer 6

A .The frame begins with the MAC address of the receiving NIC, followed by the MAC address of the sending NIC, followed, in turn, by type of encapsulated data, the data, and FCS.

Question 7

A frame ends with a special bit called the frame check sequence (FCS). What does the FCS do?
A. Cycles data across the network
B. Verifies that the MAC addresses are correct
C. Verifies that the data arrived correctly
D. Verifies that the IP address is correct

Answer 7

C. The data is followed by a special bit of checking information called the frame check sequence, which the receiving NIC uses to verify that the data arrived Correctly.

Question 8

Which of the following is an example of a MAC address? 
A. 0-255
B. 00-50-56-A3-04-0C
C. SBY3MY
D. 192.168.4.13

Answer 8

B. A MAC address is a 48-bit value, and no two NICs ever share the same MAC address – ever. 00-50-56-A3-04-0C is a MAC address.

Question 9

Which layer of the TCP/IP model controls the segmentation and reassembly of data?
A. Application layer
B. Presentation layer
C. Session layer
D. Transport layer

Answer 9

D. The Transport layer controls the segmentation and reassembly of data.

Question 10

Which layer of the OSI seven-layer model keeps track of a system's connections to send the right response to the right computer?
A. Application layer
B. Presentation layer
C. Session layer
D. Transport layer

Answer 10

C. The Session layer keeps track of a system’s connections to ensure that it sends the right response to the right computer.

Question 11

Name the layers and their numbers of the OSI seven-layer model.

Answer 11

Layer 7: Application
Layer 6: Presentation
Layer 5: Session
Layer 4: Transport
Layer 3: Network
Layer 2: Data Link
Layer 1: Physical