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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 does the IEEE 802.2 standard represent in Ethernet technologies?
A default gateway (router).
A. identifies the communicating applications b. identifies multiple conversations between the hosts
They must wait until the first hosts finish transfering the media.
Logical Link Control sublayer

2. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. it has centralized administration b. security is easier to enforce
Fiber
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

3. 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?
A. HTTP b. HTTPS
Window Size
8
RJ-45

4. Which 2 options represent Layer 4 addressing?
255.255.255.0
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. Cat5 UTP b. Cat6 UTP

5. What is the primary purpose of ARP?
A. Cat5 UTP b. Cat6 UTP
UTP
Resolve IPv4 addresses to MAC addresses.
A. goodput b. throughput c. bandwidth

6. What can be a problem that is reduced by adding end-to-end addressing?
Host A
It reduces unnecessary broadcasts.
A. decentralized resources b. resource sharing w/o a dedicated server
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

7. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Minimal delays in data delivery.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

8. What are 2 commands used to view a host routing table?
Collisions can decrease network performance.
A. netstat -r b. route PRINT
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Is a layer of specific encapsulation.

9. What is a protocol that provides connectionless network layer services?
IP Protocol
Rollover cable
A. purpose b. geographic location c. ownership
SMB

10. What is the primary function of encapsulating packets into frames?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To facilitate the entry and exit of data on media.
It uses lasers as the light source.
Binary ANDing

11. Which layer supplies services and allows user interface?
Application Layer
Network Layer
RJ-45
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network

12. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network Media Control
The destination host address.
A. goodput b. throughput c. bandwidth

13. In a connectionless system - What is correct?
A. decentralized resources b. resource sharing w/o a dedicated server
Destination is not contacted before a packet is sent.
No collisions will occur on this link.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

14. There are too many broadcasts on switches - what can be done?
A. router b. firewall
A default gateway (router).
A. replace a switch w/ a router b. subnet the new networks
Create signals that represent the bits in each frame for the media.

15. 2 most commonly used media types in ethernet networks
A. flow control b. session establishment c. numbering and sequencing
Time-to-live (TTL)
A. copper UTP b. optical fiber
Physical

16. What is a characteristic of a single-mode fiber-optic cable?
Router(config)# interface FastEthernet 0/1
A physical topology.
It uses lasers as the light source.
FTP

17. What are 2 common characteristics associated w/ dynamic routing protocols?
Signal loss can be experienced.
It has expanded adressing capabilities.
Host mobility
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

18. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
Router(config)# hostname Costas
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

19. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
As the commands are entered.
A. servers b. routers c. network printers
Destination Network Address

20. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. replace a switch w/ a router b. subnet the new networks
It uses support from the lower layers to distinguish between connections to the service.
FTP

21. After an ethernet collision - which device has priority to transmit data?
172.16.192.160
Physical
SMB
Any device whose backoff timer expires first.

22. 3 protocols that operate in the application layer
The physical address is added.
TCP initializes the sequence numbers for the sessions.
A. DNS b. SMTP c. POP
Destination is not contacted before a packet is sent.

23. Intermediary devices used to implement security between networks
Console interface
0 to 1023
A. router b. firewall
Flash

24. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
A. next-hop b. metric/interface c. destination network address
Physical
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

25. What can get you to an outside network?
Network Media Control
A. larger address space b. data types and classes of service c. authentication and encryption
The packets will be delivered and reassembled at destination.
A default gateway (router).

26. 3 terms that define the forms of help available within the Cisco IOS
Transport
Identify the device that allows local network computers to communicate w/ devices in other networks.
OTDR
A. hot keys b. context-sensitive c. command syntax check

27. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
OTDR
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Wireless

28. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network Layer Packet
A. non-deterministic b. less overhead c. collisions exist

29. To make a console connection from a comp to a Cisco router - what cable should be used?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Source and Destination IP address
Destination Network Address
Rollover cable

30. 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?
0 to 1023
A random delay helps prevent the stations from experiencing another collision during transmission.
172.16.192.160
Physical

31. What correctly describes a MAC address?
A. decentralized resources b. resource sharing w/o a dedicated server
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
UTP
A. identifies the communicating applications b. identifies multiple conversations between the hosts

32. What is PDU?
Is a layer of specific encapsulation.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Physical
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

33. Why is flow control used for TCP data transfer?
Router(config)# hostname Costas
To prevent the receiver from being overwhelmed by incoming data.
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
Time-to-live (TTL)

34. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A backbone cable.
A default gateway (router).
It has expanded adressing capabilities.

35. What is a default gateway address?

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36. Default Gateway is incorrect on the host - What is the impact on the communications?
The address of the router that the host will use to 'get to the other side'.
A default gateway (router).
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. perform degradation b. security issues c. host identification

37. statements of IP adressing
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. minimizing of collisions b. division into broadcast domains
A. HTTP b. HTTPS

38. 2 functions of encapsulation
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
OTDR
Time-to-live (TTL)

39. What is a drawback of the CSMA/CD access method?
255.255.255.0
A random delay helps prevent the stations from experiencing another collision during transmission.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Collisions can decrease network performance.

40. When a network service fails - which port is most often used to access a router for management purposes?
Supports error detection.
It uses support from the lower layers to distinguish between connections to the service.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Console

41. What describes the purpose of default route?
0 to 1023
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
Host A
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

42. What networking devices are recommended to be assigned static IP addresses?
Ctrl + Shift + 6
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. servers b. routers c. network printers
Signal loss can be experienced.

43. 3 factors that should be considered when implementing Layer 2 protocols
Network portion
A. copper UTP b. optical fiber
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
To enable a receiving host to forward the data to the appropriate application.

44. 2 characteristics of clients in data networks
Network portion
RJ-45
A. they initiate data exchanges b. they may upload data to servers
The packets will be delivered and reassembled at destination.

45. What are 2 email components used to forward mail between servers?
A. replace a switch w/ a router b. subnet the new networks
Router
It has expanded adressing capabilities.
A. MTA b. SMTP

46. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Binary ANDing
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
A. physical layer b. DLL layer

47. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. DNS b. SMTP c. POP
The address of the router that the host will use to 'get to the other side'.
MAC
Create signals that represent the bits in each frame for the media.

48. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
Signal loss can be experienced.
A. Physical b. Data Link
2046

49. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. flow control b. session establishment c. numbering and sequencing
A random delay helps prevent the stations from experiencing another collision during transmission.
Show Interfaces
A. replace a switch w/ a router b. subnet the new networks

50. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Resolve IPv4 addresses to MAC addresses.
UDP
Originate data flow.
A. media sharing b. logical topology