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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Destination is not contacted before a packet is sent.
No collisions will occur on this link.
It reduces unnecessary broadcasts.
Hosts return to listen-before-transmit mode.

2. What causes crosstalk within cable pairs when using UTP?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. performance degradation b. security issues c. host identification
A. media sharing b. logical topology
The magnetic field around the adjacent pairs of wire.

3. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It provides for the exchange of data over a common local media.
UTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

4. What is the purpose of the TCP/IP Network Application Layer?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Hub
Network Media Control
A. low overhead b. connectionless

5. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
8
A. next-hop b. metric/interface c. destination network address
Network portion
A. addressing b. error detection c. frame delimiting

6. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
A. larger address space b. data types and classes of service c. authentication and encryption
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
Wireless

7. What is the primary purpose of Layer 4?
DNS
Identify processes or services that are communicating with end devices.
Signal loss can be experienced.
Destination Network Address

8. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. larger address space b. data types and classes of service c. authentication and encryption
SMB
A. goodput b. throughput c. bandwidth
Show Interfaces

9. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
They must wait until the first hosts finish transfering the media.
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
A default gateway (router).
Destination Network Address

10. What is the purpose of the preamble in an ethernet frame?
Hosts return to listen-before-transmit mode.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
255.255.255.0
Window Size

11. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Router(config)# hostname Costas
SSH
A backbone cable.
IP is not properly installed

12. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
To enable a receiving host to forward the data to the appropriate application.
Router
A. performance degradation b. security issues c. host identification
A. Physical b. Data Link

13. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
0 to 1023
Identify processes or services that are communicating with end devices.

14. What is the primary purpose of ARP?
A. DNS b. SMTP c. POP
A. purpose b. geographic location c. ownership
Resolve IPv4 addresses to MAC addresses.
Fiber

15. What do the intermediary devices in the network do?
Next-Hop Address
A. Physical b. Data Link
Signal loss can be experienced.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

16. What are 3 common problems w/ large networks?
Hosts return to listen-before-transmit mode.
Ctrl + Shift + 6
Fiber
A. perform degradation b. security issues c. host identification

17. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Is a layer of specific encapsulation.
It provides interface between applications on either end of the network.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

18. What is an automated service that matches resource names w/ required IP addresses?
It uses support from the lower layers to distinguish between connections to the service.
DNS
Console
Host mobility

19. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A random delay helps prevent the stations from experiencing another collision during transmission.
255.255.255.224
A. flow control b. session establishment c. numbering and sequencing
It does not support encryption.

20. What method of signal transmission uses radio waves to carry signals?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A backbone cable.
The address of the router that the host will use to 'get to the other side'.
Wireless

21. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
When connecting a host to a switch.
A. physical layer b. DLL layer
A. larger address space b. data types and classes of service c. authentication and encryption

22. 3 properties of peer-2-peer applications
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. copper UTP b. optical fiber
Window Size
Physical

23. There are too many broadcasts on switches - what can be done?
SMB
A. minimizing of collisions b. division into broadcast domains
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. replace a switch w/ a router b. subnet the new networks

24. 2 most commonly used media types in ethernet networks
Router(config)# hostname Costas
A. copper UTP b. optical fiber
Logical Link Control sublayer
Show Interfaces

25. What is the proper order of the OSI Layers?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network address
UDP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

26. What type of routing uses information that is manually entered into the routing table?
IP is not properly installed
MAC
Static
Network Media Control

27. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
A physical topology.
A. MTA b. SMTP
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

28. What command can be used to determine if the router has experienced any input or output errors?
Router(config)# hostname Costas
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Show Interfaces
DNS

29. What are 2 email components used to forward mail between servers?
A. Cat5 UTP b. Cat6 UTP
Originate data flow.
A. MTA b. SMTP
Minimal delays in data delivery.

30. How does the application layer on a server process multiple client requests for services?
It has expanded adressing capabilities.
They must wait until the first hosts finish transfering the media.
Identify processes or services that are communicating with end devices.
It uses support from the lower layers to distinguish between connections to the service.

31. 3 measures of data transfer
Host mobility
A. goodput b. throughput c. bandwidth
Signal loss can be experienced.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

32. 3 features of IPv6
When connecting a host to a switch.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. larger address space b. data types and classes of service c. authentication and encryption
A. hot keys b. context-sensitive c. command syntax check

33. What makes fiber preferable to copper for interconnecting buildings?
Network Layer Packet
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. low overhead b. connectionless
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

34. At which layers of the OSI model does ethernet operate?
A. next-hop b. metric/interface c. destination network address
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
OTDR
A. physical layer b. DLL layer

35. 3 statements of media acess control
Router(config)# hostname Costas
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
SSH
A. media sharing b. logical topology

36. Which IP packet field will prevent endless loops?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Any device whose backoff timer expires first.
MAC
Time-to-live (TTL)

37. What is dinamically selected by the source host when forwarding data?
A. netstat -r b. route PRINT
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Source Port
A. it has centralized administration b. security is easier to enforce

38. 3 facts about the network portion of an IPv4 address
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. hot keys b. context-sensitive c. command syntax check
A. low overhead b. connectionless

39. 3 factors that should be considered when implementing Layer 2 protocols
It has expanded adressing capabilities.
A. hot keys b. context-sensitive c. command syntax check
Twisting of the cables
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

40. 2 characteristics of peer-2-peer
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Identify the device that allows local network computers to communicate w/ devices in other networks.
Resolve IPv4 addresses to MAC addresses.
A. decentralized resources b. resource sharing w/o a dedicated server

41. 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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
OTDR
A. next-hop b. metric/interface c. destination network address

42. Which 2 options represent Layer 4 addressing?
Application Layer
Network Layer Packet
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they initiate data exchanges b. they may upload data to servers

43. After an ethernet collision - which device has priority to transmit data?
As the commands are entered.
Any device whose backoff timer expires first.
A. Cat5 UTP b. Cat6 UTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

44. An admin needs to keep contents private - which access method should he use?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
SSH

45. 3 primary functions of the data link layer encapsulation
UDP
A. physical layer b. DLL layer
Source and Destination Ports
A. addressing b. error detection c. frame delimiting

46. In business LANs - which connector is used w/ twisted-pair networking cable?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
RJ-45
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A random delay helps prevent the stations from experiencing another collision during transmission.

47. What statements describe the logical token-passing topology?
A. media sharing b. logical topology
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. HTTP b. HTTPS
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

48. 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?
Router
Host A
Static
The MAC protocol can be very simple.

49. What 2 type of cables would most commonly be used for new runs?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. DNS b. SMTP c. POP
A. Cat5 UTP b. Cat6 UTP
A. media sharing b. logical topology

50. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
Originate data flow.
It has expanded adressing capabilities.
A. addressing b. error detection c. frame delimiting

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CCNA - 2

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