kunci jawaban ccna 1 module 6

1At what layer of the OSI model does a MAC address reside?
*2

2 How many hexadecimal digits are in a MAC address?
*12

3 In which two layers of the OSI model does Ethernet function? (Choose two.)
*data link
*physical

4 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.

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 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.


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