Cisco Module 6 Exam - CCNA 1 Networking Basics

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CCNA 6 Networking Basics (Version 3.1)

Article Source: CCNA 1 Networking Basics (Version 3.1)

1.  A router has an Ethernet, Token Ring, serial, and ISDN interface. Which interfaces will have a MAC address?
  -serial and ISDN interfaces
  *•*Ethernet and Token Ring interfaces
  -Ethernet and ISDN interfaces
  -Token Ring and serial interfaces

2.

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?
  -CSMA/CD
  *•*full-duplex
  -FastEthernet
  -crossover cable

3.  Which of the following are specified by IEEE standards as sublayers of the OSI data link layer? (Choose two.)
  *•*Logical Link Control
  -Logical Layer Control
  *•*Media Access Control
  -Logical Link Communication
  -Media Access Communication
  -Physical Access Communication

4.  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 checks the formatting of data before it is transmitted.
  *•*A NIC passes the contents of selected frames to the upper OSI layers.
  -A NIC acknowledges and retransmits data that was not received properly.
  -A NIC discards frames when the destination IP address does not match the local host.

5.  In an Ethernet LAN, how does the NIC know when it can transmit data?
  -An Ethernet NIC transmits data as soon as the frame is received.
  -An Ethernet NIC transmits data as soon as the NIC receives a token.
  -An Ethernet NIC transmits data when it senses a collision.
  *•*An Ethernet NIC transmits data after listening for the absence of a signal on the media.

6.

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 is modified as it passes through each switch.
  *•*The frame format remains the same across each Ethernet segment.
  -The frame format is modified as the media speed changed at switch B and switch E.
  -The frame format is modified as the media material changes between copper and fiber at switch C and switch D.

7.  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.
  -The hosts creating the collision have priority to send data.
  -The hosts creating the collision retransmit the last 16 frames.
  -The hosts extend their delay period to allow for rapid transmission.

8.  Which statement describes how CSMA/CD on an Ethernet segment manages the retransmission of frames after a collision occurs?
  -The first device to detect the collision has the priority for retransmission.
  -The device with the lowest MAC address determines the retransmission priority.
  -The devices on the network segment hold an election for priority to retransmit data
  *•*The devices transmitting when the collision occurs DO NOT have priority for retransmission.

9.  Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?
  -A random delay is used to ensure a collision-free link.
  -A random delay value for each device is assigned by the manufacturer.
  -A standard delay value could not be agreed upon among networking device vendors.
  *•*A random delay helps prevent the stations from experiencing another collision during the transmission.

10.

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.)
  -Hosts 1 and 4 may be operating full duplex so no collision will exist.
  -The hub will block the port connected to Host 4 to prevent a collision.
  *•*After the end of the jam signal, a backoff algorithm is invoked.
  -Hosts 1 and 4 are assigned shorter backoff values to provide them priority to access the media.
  *•*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.

11.  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?
  -hybrid
  -half duplex
  *•*full duplex
  -multilink

12.  Which two devices can provide full-duplex Ethernet connections? (Choose two.)
  -hub
  -modem
  -repeater
  *•*NIC
  *•*Layer 2 switch

13.  Where does the MAC address originate?
  -DHCP server database
  -configured by the administrator
  *•*burned into ROM on the NIC card
  -network configuration on the computer
  -included in the creation of the processor chip

14.

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?
  -autonegotiation
  -FastEthernet
  -peer-to-peer shared resources
  *•*administratively configured full duplex

15.  In which two layers of the OSI model does Ethernet function? (Choose two.)
  -application
  -session
  -transport
  -network
  *•*data link
  *•*physical

16.

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.
  -Only one of the devices can transmit at a time.
  -The switch will have priority for transmitting data.
  -The devices will default back to half duplex if excessive collisions occur.

17.  How many hexadecimal digits are in a MAC address?
  -2
  -8
  *•*12
  -16
  -32

18.  At what layer of the OSI model does a MAC address reside?
  -1
  *•*2
  -3
  -4
  -7

19.  Which characteristics describe carrier sense multiple access collision detect (CSMA/CD)? (Choose three.)
  -reliable
  -point-to-point
  *•*nondeterministic
  -connection-oriented
  *•*collision environment
  *•*first-come, first-served approach

Article Source: CCNA 1 Networking Basics (Version 3.1)