Test your basic knowledge |

CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is the role of the OSI Application Layer?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. decentralized resources b. resource sharing w/o a dedicated server
It provides interface between applications on either end of the network.
Destination Network Address

2. During encapsulation - what happens in the Data Link Layer?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The physical address is added.
Source and Destination Ports
A. they initiate data exchanges b. they may upload data to servers

3. When do changes take effect in a Cisco router?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
It provides for the exchange of data over a common local media.
IP is not properly installed
As the commands are entered.

4. What is the function of the DLL?
It reduces unnecessary broadcasts.
It provides for the exchange of data over a common local media.
32 bits
The packets will be delivered and reassembled at destination.

5. 3 statements about the role of routers in the network
The MAC protocol can be very simple.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Originate data flow.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

6. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. media sharing b. logical topology
255.255.255.224
It provides for the exchange of data over a common local media.
255.255.255.0

7. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
The address of the router that the host will use to 'get to the other side'.
Originate data flow.
A. servers b. routers c. network printers

8. What are 2 commands used to view a host routing table?
UDP
A. netstat -r b. route PRINT
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
80 (HTTP)

9. Why is flow control used for TCP data transfer?
Is a layer of specific encapsulation.
To prevent the receiver from being overwhelmed by incoming data.
A. goodput b. throughput c. bandwidth
A. decentralized resources b. resource sharing w/o a dedicated server

10. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
172.16.192.160
A. media sharing b. logical topology
IP is not properly installed
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate

11. What do the intermediary devices in the network do?
A. flow control b. session establishment c. numbering and sequencing
It does not support encryption.
A. DB 60 b. Winchester 15-pin c. smart serial
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

12. 3 functions of the upper data link sublayer in the OSI model
SSH
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. HTTP b. HTTPS
Ctrl + Shift + 6

13. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
255.255.255.224
A. media sharing b. logical topology
80 (HTTP)

14. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
A. flow control b. session establishment c. numbering and sequencing
The MAC protocol can be very simple.
Network
Host A

15. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses support from the lower layers to distinguish between connections to the service.
A random delay helps prevent the stations from experiencing another collision during transmission.
Hosts return to listen-before-transmit mode.
Console

16. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
RJ-45
A. goodput b. throughput c. bandwidth
Collisions can decrease network performance.

17. What can be a problem that is reduced by adding end-to-end addressing?
2046
A. decentralized resources b. resource sharing w/o a dedicated server
When connecting a host to a switch.
It reduces unnecessary broadcasts.

18. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
As the commands are entered.
The destination host address.

19. At which layers of the OSI model does ethernet operate?
It uses support from the lower layers to distinguish between connections to the service.
A. DNS b. SMTP c. POP
Physical
A. physical layer b. DLL layer

20. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
A. addressing b. error detection c. frame delimiting
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

21. There are too many broadcasts on switches - what can be done?
2046
A. replace a switch w/ a router b. subnet the new networks
The packets will be delivered and reassembled at destination.
A. application b. services

22. Which characteristics describe fiber optic cable?
Source and Destination IP address
A physical topology.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Application Layer

23. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
It provides for the exchange of data over a common local media.
Transport
OTDR
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

24. 3 factors that should be considered when implementing Layer 2 protocols
A. servers b. routers c. network printers
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Time-to-live (TTL)

25. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. addressing b. error detection c. frame delimiting
Window Size
DNS
RJ-45

26. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
RJ-45
Router(config)# hostname Costas
Next-Hop Address

27. When a network service fails - which port is most often used to access a router for management purposes?
A. media sharing b. logical topology
MAC
A. HTTP b. HTTPS
Console

28. How does the application layer on a server process multiple client requests for services?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
No collisions will occur on this link.
Hub
It uses support from the lower layers to distinguish between connections to the service.

29. What can you identify when you examine the Network Layer header?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A physical topology.
The destination host address.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Wireless
To prevent the receiver from being overwhelmed by incoming data.
It provides interface between applications on either end of the network.
A. Physical b. Data Link

31. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. HTTP b. HTTPS
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. the router will discard the packet b. the router will send a time exceeded message to the source host

32. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Supports error detection.
A. minimizing of collisions b. division into broadcast domains
255.255.255.224
A. physical layer b. DLL layer

33. 3 common problems w/ a large network
Network Layer
SMB
A. performance degradation b. security issues c. host identification
A. HTTP b. HTTPS

34. 3 statements of media acess control
Network
To enable a receiving host to forward the data to the appropriate application.
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media
A. HTTP b. HTTPS

35. What is a protocol that provides connectionless network layer services?
IP Protocol
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Supports error detection.
Source and Destination IP address

36. What is dinamically selected by the source host when forwarding data?
Source Port
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network

37. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. perform degradation b. security issues c. host identification
A. application b. presentation c. session d. transmision e. network f. data link g. physical
SMB
Rollover cable

38. Which IP packet field will prevent endless loops?
Minimal delays in data delivery.
Time-to-live (TTL)
A. DNS b. SMTP c. POP
Signal loss can be experienced.

39. What are the advantages of using a client-server model?
FTP
Console
A. it has centralized administration b. security is easier to enforce
Transport

40. What is the purpose of a default gateway?
A. copper UTP b. optical fiber
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network portion
Originate data flow.

41. What is the primary purpose of Layer 4?
It reduces unnecessary broadcasts.
Network address
Identify processes or services that are communicating with end devices.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

42. 3 properties of peer-2-peer applications
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. MTA b. SMTP
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
Wireless

43. If you have a small network w/ 3 computers...
Rollover cable
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
2046
Create signals that represent the bits in each frame for the media.

44. What command is used to change the default name to 'Costas'?
Destination Network Address
Router(config)# hostname Costas
A. MTA b. SMTP
Static

45. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A default gateway (router).
A. perform degradation b. security issues c. host identification

46. What is a benefit of a WAN?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Router
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
Host mobility

47. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
Network Layer
A. DB 60 b. Winchester 15-pin c. smart serial
The MAC protocol can be very simple.

48. What are 2 email components used to forward mail between servers?
Application Layer
To enable a receiving host to forward the data to the appropriate application.
A. MTA b. SMTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling

49. What information is added during encapsulation at OSI Layer 3?
Minimal delays in data delivery.
Supports error detection.
Source and Destination IP address
Show Interfaces

50. What do you need to use for an initial configuration on a Cisco router?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. media sharing b. logical topology
Console interface
A. perform degradation b. security issues c. host identification