CCNA (V.31) Semester-1- Question - Answers- Paper 8

CCNA (V.31) Semester-1- Question - Answers- Paper 8


1 Which switching mode describes a switch that transfers a frame as soon as the destination MAC address is read?

fragment-free
* cut-through
store-and-forward
latency forwarding

2 What does a switch broadcast to let other switches know of its existence on the LAN?

STP
STA
BDPU
BPU
* BPDU



3 Which of the following network types uses networking devices to extend the distances that cable can be run?

length/shared media
* extended shared media
point-to-point network
extended point-to-point network
multiple access/point-to-point


4 Which of the following is a term associated with replacing hubs with switches to increase the number of collision domains?

encapsulation
latency
* segmentation
layered model
broadcast domain
extended

5 While working on her computer, Mary noticed longer than normal network data transfers. Mary investigates the problem and notices that her co-worker John has been hosting an online video conference. What is the network probably experiencing?

collision storm
* broadcast storm
IP storm
data rain storm

6 Which of the following does a router use to make a forwarding decision?

* destination IP address
MAC address
source IP address
encapsulation address
default gateway

7 A network administrator has a multi-floor LAN to monitor and maintain. Through careful monitoring, the administrator has noticed a large amount of broadcast traffic slowing the network. Which device would you use to best solve this problem?

bridge
hub
* router
transceiver

8 What is a disadvantage of cut-through switching?

* no error checking
a decrease in error checking
decrease in number of collision domains
decrease in bandwidth
increased latency

9 Which of the following would alleviate the problem of excessive collisions in a LAN? (Choose two.)

* reduce the size of collision domains
reduce number of broadcast domains
add extra hubs
* add extra managed switches
add additional transceivers
increase the length of UTP cable runs

10 Which of the following protocols is used to eliminate loops?

* STP
BDPU
UDP
EIGRP
learning

11 Which of the following are considered Layer 1 devices? (Choose two.)

router
switch
* repeater
bridge
* hub

12 Which of the following are not to be exceeded when implementing the 5-4-3-2-1 Rule? (Choose three.)

five broadcast domains
* four hubs
three routers
* three host segments
* one collision domain

13 Which of the following describes the concept of full-duplex mode?

traffic passing in one direction at a time with no collisions
traffic passing faster downstream than upstream
* traffic passing equally in both directions with no collisions
traffic passing faster upstream than downstream

14 Which switching mode results in the lowest amount of latency and provides no error checking?

* cut-through
fragment-free
store-and-forward
synchronous

15 What impact does a bridge have on a network? (Choose two.)

reduces the number collision domains
* increases number of collision domains
adds additional broadcast domains
* has no impact on broadcast domains
reduces the length of the shared media

16 Which items are contributors to latency in a switched network? (Choose two.)

* circuit delays
* software delays
incorrect MAC addressing
too many collision domains


17 Which LAN devices make frame forwarding decisions based on MAC addresses? (Choose two.)

hub
router
* bridge
* switch
transceiver

18 What does a switch build as it reads MAC addresses that pass through it?

Routing Topology table
* Content Addressable Memory table
Store and Forward list
Cut-through domain
MAC Route Address table

19 What will a bridge do if it receives a frame with a MAC address that is not within the table?

discard frame
ignore frame
send frame to appropriate port
* send frame to all ports except source port

20 A switch reads the first 64 bytes of a data field and forwards data, before the entire data field has been read. Which switching method allows this?

store and forward
cut-through
* fragment-free
asymmetric
symmetric

21 Which switching method allows a switch to receive the entire frame before sending it out the destination port?

* store and forward
cut-through
fragment-free
asymmetric

22 What does a workstation broadcast to learn an unknown MAC address?

RARP request
* ARP request
STA request
STP request

23 Which LAN switching mode has the lowest latency?

* cut-through
fragment-free
latency forwarding
store-and-forward

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