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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 command can be used to determine if the router has experienced any input or output errors?
Is used by the server to resolve names.
2046
Fiber
Show Interfaces

2. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Resolve IPv4 addresses to MAC addresses.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

3. 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
A. low overhead b. connectionless
A. servers b. routers c. network printers
2046

4. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network Layer Packet

5. At which layers of the OSI model does ethernet operate?
A. replace a switch w/ a router b. subnet the new networks
A. physical layer b. DLL layer
DNS
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

6. 3 measures of data transfer
A default gateway (router).
A. larger address space b. data types and classes of service c. authentication and encryption
A. performance degradation b. security issues c. host identification
A. goodput b. throughput c. bandwidth

7. What makes fiber preferable to copper for interconnecting buildings?
Destination Network Address
A. replace a switch w/ a router b. subnet the new networks
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Application Layer

8. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. copper UTP b. optical fiber
Hub
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
Hosts return to listen-before-transmit mode.

9. Intermediary devices used to implement security between networks
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
A. router b. firewall
A. physical layer b. DLL layer
Minimal delays in data delivery.

10. 3 functions of the upper data link sublayer in the OSI model
A. it has centralized administration b. security is easier to enforce
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
IP Protocol
UDP

11. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Network Layer
TCP initializes the sequence numbers for the sessions.
SMB
A. flow control b. session establishment c. numbering and sequencing

12. 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?
Transport
The destination host address.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
8

13. What application layer protocol is used to support file transfers between client and server?
A. larger address space b. data types and classes of service c. authentication and encryption
FTP
To prevent the receiver from being overwhelmed by incoming data.
A. hot keys b. context-sensitive c. command syntax check

14. There are too many broadcasts on switches - what can be done?
To facilitate the entry and exit of data on media.
A. low overhead b. connectionless
SMB
A. replace a switch w/ a router b. subnet the new networks

15. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
A. application b. services
A. netstat -r b. route PRINT
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

16. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A physical topology.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

17. 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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. show startup-config b. show running-config
Identify the device that allows local network computers to communicate w/ devices in other networks.

18. 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. 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
Minimal delays in data delivery.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

19. What type of network cable is used between a terminal and a console port?
Network Media Control
Rollover cable
172.16.192.160
To facilitate the entry and exit of data on media.

20. What is a default gateway address?

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21. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
32 bits
The MAC protocol can be very simple.
Collisions can decrease network performance.
Destination Network Address

22. If you have a small network w/ 3 computers...
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
The packets will be delivered and reassembled at destination.
UDP
Switch

23. 2 features that make switches preferable to hubs
A. decentralized resources b. resource sharing w/o a dedicated server
A. minimizing of collisions b. division into broadcast domains
A. perform degradation b. security issues c. host identification
Console

24. 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?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. larger address space b. data types and classes of service c. authentication and encryption
They must wait until the first hosts finish transfering the media.
Network Access

25. What is an effect of improperly applying a network cable connector?
Static
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Signal loss can be experienced.
SSH

26. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Minimal delays in data delivery.
The magnetic field around the adjacent pairs of wire.
UTP

27. 3 statements about routes and their use
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
Destination Network Address
32 bits
A. show startup-config b. show running-config

28. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
Rollover cable
A. low overhead b. connectionless
SMB

29. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
8
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
172.16.192.160

30. To make a console connection from a comp to a Cisco router - what cable should be used?
A. hot keys b. context-sensitive c. command syntax check
FTP
Binary ANDing
Rollover cable

31. When do changes take effect in a Cisco router?
As the commands are entered.
RJ-45
Show Interfaces
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

32. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
Physical
0 to 1023
Time-to-live (TTL)

33. Statements that describe LAN
Collisions can decrease network performance.
A physical topology.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
IP Protocol

34. What can you identify when you examine the Network Layer header?
The destination host address.
A. flow control b. session establishment c. numbering and sequencing
Logical Link Control sublayer
OTDR

35. What is the purpose of a default gateway?
A. media sharing b. logical topology
Identify the device that allows local network computers to communicate w/ devices in other networks.
Physical
The magnetic field around the adjacent pairs of wire.

36. What is dinamically selected by the source host when forwarding data?
Source Port
Rollover cable
The MAC protocol can be very simple.
Resolve IPv4 addresses to MAC addresses.

37. What is a component of a routing table entry?
Console
Twisting of the cables
Next-Hop Address
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

38. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Host mobility
Is used by the server to resolve names.
255.255.255.224
255.255.255.0

39. 2 characteristics of clients in data networks
A. perform degradation b. security issues c. host identification
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. they initiate data exchanges b. they may upload data to servers
IP Protocol

40. If you have a full-duplex operational network - what can happen?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
No collisions will occur on this link.
A. DNS b. SMTP c. POP
Network Access

41. What is the primary purpose of Layer 4?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. services
Identify processes or services that are communicating with end devices.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

42. 3 terms that define the forms of help available within the Cisco IOS
A. Cat5 UTP b. Cat6 UTP
A. hot keys b. context-sensitive c. command syntax check
Identify processes or services that are communicating with end devices.
A. media sharing b. logical topology

43. Why is flow control used for TCP data transfer?
It provides for the exchange of data over a common local media.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
To prevent the receiver from being overwhelmed by incoming data.
Console interface

44. 2 functions of encapsulation
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
255.255.255.224
A default gateway (router).

45. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
Router(config)# hostname Costas
A. non-deterministic b. less overhead c. collisions exist
IP Protocol

46. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Switch
MAC

47. What info is found in the TCP and UDP header info?
Network address
Source and Destination Ports
Hosts return to listen-before-transmit mode.
A default gateway (router).

48. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The magnetic field around the adjacent pairs of wire.
It has expanded adressing capabilities.
A. addressing b. error detection c. frame delimiting

49. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
Network Access
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
Time-to-live (TTL)

50. Network Protocols
Window Size
To prevent the receiver from being overwhelmed by incoming data.
The magnetic field around the adjacent pairs of wire.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations