ENetwork Chapter 9

1   
Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.

•     BA

   
2   
Which of the following describe interframe spacing? (Choose two.)

•     the minimum interval, measured in bit-times, that any station must wait before sending another frame
•     the time allowed for slow stations to process a frame and prepare for the next frame

   
3   
When a collision occurs in a network using CSMA/CD, how do hosts with data to transmit respond after the backoff period has expired?

•     The hosts return to a listen-before-transmit mode.

   
4   
After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data?

•     any device in the collision domain whose backoff timer expires first

   
5   
Which of the following is a drawback of the CSMA/CD access method?

•     Collisions can decrease network performance.

   
6   

Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?

•     No collisions will occur on this link.

   
7   
Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?

•     A random delay helps prevent the stations from experiencing another collision during the transmission.

8   

In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?

•     Host B must wait until it is certain that Host A has completed sending its frame.

9   
Ethernet operates at which layers of the OSI model? (Choose two.)

•     Physical layer
•     Data-link layer

10   
What does the IEEE 802.2 standard represent in Ethernet technologies?

•     Logical Link Control sublayer

   
11   
Which statements correctly describe MAC addresses? (Choose three.)

•     copied into RAM during system startup
•     contains a 3 byte OUI
•     6 bytes long

   
12   

Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)

•     A frame with the destination MAC address of Router_A.
•     A packet with the destination IP of Server_B.

   
13   
Host A has an IP address of 172.16.225.93, a mask of 255.255.248.0, and a default gateway of 172.16.224.1. Host A needs to send a packet to a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on its address and subnet mask. What two things will occur? (Choose two.)

•     Host A will broadcast an ARP request for the MAC of the host 172.16.231.78.
•     Host A will change the destination IP of the packet to 172.16.224.1 and forward the packet.

   
14   
Which two features make switches preferable to hubs in Ethernet-based networks? (Choose two.)

•     minimizing of collisions
•     increase in the throughput of communications

15   
Ethernet operates at which layer of the TCP/IP network model?

•     network access

   
16   
What are three functions of the upper data link sublayer in the OSI model? (Choose three.)

•     identifies the network layer protocol
•     makes the connection with the upper layers
•     insulates network layer protocols from changes in physical equipment

   
17   
What three primary functions does data link layer encapsulation provide? (Choose three.)

•     addressing
•     error detection
•     frame delimiting

   
18   
What are the two most commonly used media types in Ethernet networks today? (Choose two.)

•     copper UTP
•     optical fiber

   
19   

Refer to the exhibit. Which option correctly identifies content that the frame data field may contain?

•     network layer packet

   
20   
What is the primary purpose of ARP?

•     resolve IPv4 addresses to MAC addresses

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