mangj

1. 1. Which layer of  the OSI model is responsible   for data encryption?

• A. Presentation     

• B. Session

• C. Network

• D. Data Link

2. (0.2 point)

You  have been hired by a company  that uses a topology shown below. In looking at the physical layout of your network, which  of the following  types of topologies is being used?

• A. Bus

• B. Star

• C.Mesh

• D.Ring

3. (0.2 point)

You  are designing a 1000Base-T network. In creating this network, what distance limitation will you be facing when installing the cabling?

• A.100m

• B. 185m

• C.500m

• D. 2km

33. (0.2 point)

Your  network uses 100BaseFX so that data can be  transferred at higher speeds  and up  to distances of 400 m. During transmission, data can  travel in both directions, but only in one  direction at a given time. Which of the following  transmission methods is used?

• A. Simplex                                                

•     B. FireWire

• C. Half-Duplex                               

•                D. Full Duplex

Which service  listed below  is  used  to resolve (quyết định) IP addresses and domain names?

• A. DNS

• B. DHCP (Dynamic Host Configuration Protocol - assigning IP addresses)

• C. ARP (Address Resolution Protocol - Giao thức phân giải địa chỉ)

• D. TCP (Transmission Control Protocol - Giao thức điều khiển truyền vận)

5.(2 point)

Identify the class of IP  Address for  the following IP  address 114.101.101.101?

• A. Class A                                        

•    B. Class B

• C. Class C                                       

•      D. Class D

Which example  is a network adapter loopback address?

• A. 255.0.0.1                                      

•   B. 192.0.0.1

• C. 255.255.0.0                              

•        D. 255.0.0.0

8. (0.2 point)

Your  network has 10  computers that are networked  together using  a star topology.  Which  of the following is  a possible point  of  failure for this topology,  which  could bring down the  entire network?

• A. Cable     

• B. Network card

• C. T-Connector

• D. HUB

9. (0.2 point)

The network layer protocol of the internet is:

• A. ethernet                                         

•   B. internet protocol

• C. hypertext transfer protocol           

•    D. user datagram protocol

10. (0.2 point)

You are the network  administrator of a 10BaseT network. On the weekend,  when  a few people are working,  you run 110 m of cable  to a new  server that is being  used as a file server. The cable is installed in a new  section of the building,  where no  cabling  currently exists.  When you attempt to access  files on  the server, they are experiencing errors and corrupt data. Which of the following  is most  likely the cause of this problem?

• A. Bandwidth       

• B. Attenuation (suy giảm)

• C. Crosstalk from a neighboring  cable

• D. CSMA/CD issues