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. During encapsulation - what happens in the Data Link Layer?
Router
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Source and Destination Ports
The physical address is added.

2. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. Physical b. Data Link
A. enable mode b. priviledge executive mode
A. DB 60 b. Winchester 15-pin c. smart serial
A. application b. services

3. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Static
Network Access
A. MTA b. SMTP

4. Why is flow control used for TCP data transfer?
Network
Supports error detection.
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.

5. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. decentralized resources b. resource sharing w/o a dedicated server
To prevent the receiver from being overwhelmed by incoming data.

6. Important characteristic of UDP
A. Cat5 UTP b. Cat6 UTP
They must wait until the first hosts finish transfering the media.
Minimal delays in data delivery.
A. non-deterministic b. less overhead c. collisions exist

7. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
80 (HTTP)
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.
Fiber

8. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses lasers as the light source.
Application Layer
Fiber
Hosts return to listen-before-transmit mode.

9. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
A backbone cable.
SMB
A physical topology.

10. Why are port numbers included in the TCP header of a segment?
The destination host address.
A. application b. services
To enable a receiving host to forward the data to the appropriate application.
Router(config)# hostname Costas

11. What type of routing uses information that is manually entered into the routing table?
OTDR
Console
Static
0 to 1023

12. 2 characteristics of clients in data networks
RJ-45
A. they initiate data exchanges b. they may upload data to servers
A. larger address space b. data types and classes of service c. authentication and encryption
A random delay helps prevent the stations from experiencing another collision during transmission.

13. What are 2 email components used to forward mail between servers?
Network Access
Source Port
A default gateway (router).
A. MTA b. SMTP

14. What is a protocol that provides connectionless network layer services?
IP Protocol
RJ-45
A. next-hop b. metric/interface c. destination network address
A. DNS b. SMTP c. POP

15. If you have a full-duplex operational network - what can happen?
Router(config)# interface FastEthernet 0/1
No collisions will occur on this link.
Network address
The magnetic field around the adjacent pairs of wire.

16. 3 protocols that operate in the application layer
Network
A. DNS b. SMTP c. POP
A backbone cable.
Fiber

17. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
No collisions will occur on this link.
It uses support from the lower layers to distinguish between connections to the service.
Identify processes or services that are communicating with end devices.

18. What command is used to change the default name to 'Costas'?
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
Source Port
The destination host address.
Router(config)# hostname Costas

19. What makes fiber preferable to copper for interconnecting buildings?
Host mobility
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A default gateway (router).
Static

20. When is a straight-through cable used in a network?
Application Layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
255.255.255.0
When connecting a host to a switch.

21. 3 factors that should be considered when implementing Layer 2 protocols
A. servers b. routers c. network printers
The MAC protocol can be very simple.
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

22. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Twisting of the cables
Console
UDP
Network

23. If you have a small network w/ 3 computers...
A. replace a switch w/ a router b. subnet the new networks
255.255.255.224
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 MAC protocol can be very simple.

24. What kind of problems are caused by excessive broadcast traffic on network segments?
Supports error detection.
80 (HTTP)
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

25. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
The address of the router that the host will use to 'get to the other side'.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Application Layer

26. What determines the method of media access control?
A. next-hop b. metric/interface c. destination network address
Destination Network Address
8
A. media sharing b. logical topology

27. What are 2 forms of application layer software?
A. application b. services
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Rollover cable
To prevent the receiver from being overwhelmed by incoming data.

28. 2 functions of encapsulation
It uses support from the lower layers to distinguish between connections to the service.
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
Ctrl + Shift + 6
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

29. What characteristic of an UTP helps reduce interference?
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
32 bits
Create signals that represent the bits in each frame for the media.
Twisting of the cables

30. An admin needs to keep contents private - which access method should he use?
A. they initiate data exchanges b. they may upload data to servers
Is used by the server to resolve names.
Hub
SSH

31. 3 features that allow TCP to realibly and accurately track the transmission of data
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
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. flow control b. session establishment c. numbering and sequencing
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

32. What is the primary function of encapsulating packets into frames?
Router(config)# interface FastEthernet 0/1
To facilitate the entry and exit of data on media.
Transport
Supports error detection.

33. What are 2 commands used to view a host routing table?
A. DB 60 b. Winchester 15-pin c. smart serial
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
Logical Link Control sublayer
A. netstat -r b. route PRINT

34. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. Cat5 UTP b. Cat6 UTP
It uses lasers as the light source.
A default gateway (router).
Transport

35. What is the primary rope of the physical layer in transmitting data?
OTDR
Create signals that represent the bits in each frame for the media.
A. DB 60 b. Winchester 15-pin c. smart serial
It uses support from the lower layers to distinguish between connections to the service.

36. 3 features of IPv6
It uses support from the lower layers to distinguish between connections to the service.
A. larger address space b. data types and classes of service c. authentication and encryption
When connecting a host to a switch.
255.255.255.224

37. What are 3 common problems w/ large networks?
The physical address is added.
They must wait until the first hosts finish transfering the media.
A. Cat5 UTP b. Cat6 UTP
A. perform degradation b. security issues c. host identification

38. 3 properties of peer-2-peer applications
Rollover cable
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
Network Access
The address of the router that the host will use to 'get to the other side'.

39. There are too many broadcasts on switches - what can be done?
32 bits
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To facilitate the entry and exit of data on media.
A. replace a switch w/ a router b. subnet the new networks

40. What do you need to use for an initial configuration on a Cisco router?
A. Physical b. Data Link
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Console interface
Router

41. When a network service fails - which port is most often used to access a router for management purposes?
A physical topology.
Console
RJ-45
It uses support from the lower layers to distinguish between connections to the service.

42. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A backbone cable.
Source and Destination IP address
Router(config)# interface FastEthernet 0/1
Host mobility

43. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. netstat -r b. route PRINT
A. DNS b. SMTP c. POP
Network Media Control
A physical topology.

44. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
It provides interface between applications on either end of the network.
Switch
Identify the device that allows local network computers to communicate w/ devices in other networks.
Create signals that represent the bits in each frame for the media.

45. What is a drawback of the CSMA/CD access method?
A. router b. firewall
The MAC protocol can be very simple.
A. low overhead b. connectionless
Collisions can decrease network performance.

46. What method of signal transmission uses radio waves to carry signals?
A. low overhead b. connectionless
Wireless
A. flow control b. session establishment c. numbering and sequencing
OTDR

47. What are 2 protocols for transfering web resources?
UTP
A. HTTP b. HTTPS
0 to 1023
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

48. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
Time-to-live (TTL)
A random delay helps prevent the stations from experiencing another collision during transmission.
UTP

49. What is the purpose of resource records in DNS?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
RJ-45
The address of the router that the host will use to 'get to the other side'.
Is used by the server to resolve names.

50. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Layer
A. Physical b. Data Link
A. media sharing b. logical topology