1 Refer to the exhibit. Host A is communicating with host F. What happens to a frame sent from host A to host F as it travels over the Ethernet segments?
*The frame format remains the same across each Ethernet segment.
2 How many hexadecimal digits are in a MAC address?
*12
3 What are three functions of a NIC in a PC? (Choose three.)
*A NIC connects the PC to the network media.
*A NIC detects collisions on the Ethernet segment.
*A NIC passes the contents of selected frames to the upper OSI layers.
4 At what layer of the OSI model does a MAC address reside?
*2
5 A router has an Ethernet, Token Ring, serial, and ISDN interface. Which interfaces will have a MAC address?
*Ethernet and Token Ring interfaces
6 In an Ethernet LAN, how does the NIC know when it can transmit data?
*An Ethernet NIC transmits data after listening for the absence of a signal on the media.
7 Which characteristics describe carrier sense multiple access collision detect (CSMA/CD)? (Choose three.)
*nondeterministic
*collision environment
*first-come, first-served approach
8 Which two devices can provide full-duplex Ethernet connections? (Choose two.)
*NIC
*Layer 2 switch
9 On a local area network, one workstation can send data on the line while it is receiving data. What type of data transfer does this describe?
*full duplex
10 Refer to the exhibit. The small office network shown in the exhibit consists of four computers connected through a hub. Which configuration would cause collisions and errors on the network?
*administratively configured full duplex
11 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
12. Refer to the exhibit. All hosts are in listen mode. Host 1 and Host 4 both transmit data at the same time. How do the hosts respond on the network? (Choose two.)
*After the end of the jam signal, Hosts 1, 2, 3, and 4 invoke a backoff algorithm.
*If a host has data to transmit after the backoff period of that host, the host checks to determine if the line is idle, before transmitting.
13. 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.
14 Which statement describes how CSMA/CD on an Ethernet segment manages the retransmission of frames after a collision occurs?
*The devices transmitting when the collision occurs DO NOT have priority for retransmission.
15 Refer to the exhibit. A technician wants to increase the available bandwidth for the workstation by allowing the switch and the NIC on the workstation to transmit and receive simultaneously. What will permit this?
*full-duplex
16 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.
17 In which two layers of the OSI model does Ethernet function? (Choose two.)
*data link
*physical
18 Which of the following are specified by IEEE standards as sublayers of the OSI data link layer? (Choose two.)
*Logical Link Control
*Media Access Control
19 Where does the MAC address originate?
*burned into ROM on the NIC card
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