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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. How does the application layer on a server process multiple client requests for services?
32 bits
80 (HTTP)
It uses support from the lower layers to distinguish between connections to the service.
A. perform degradation b. security issues c. host identification

2. What application layer protocol is used to support file transfers between client and server?
A physical topology.
Flash
Switch
FTP

3. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. copper UTP b. optical fiber
Network address
Transport
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

4. What do the intermediary devices in the network do?
Window Size
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Binary ANDing
UTP

5. What can be a problem that is reduced by adding end-to-end addressing?
Physical
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It reduces unnecessary broadcasts.
A. copper UTP b. optical fiber

6. What layer encapsulates segments into packets?
Source Port
Network Layer
The magnetic field around the adjacent pairs of wire.
It provides for the exchange of data over a common local media.

7. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
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.
Router(config)# interface FastEthernet 0/1
Originate data flow.

8. What is the function of the DLL?
Network Layer Packet
Is a layer of specific encapsulation.
A. low overhead b. connectionless
It provides for the exchange of data over a common local media.

9. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
To prevent the receiver from being overwhelmed by incoming data.
A. hot keys b. context-sensitive c. command syntax check
A. identifies the communicating applications b. identifies multiple conversations between the hosts

10. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
To enable a receiving host to forward the data to the appropriate application.
SMB
No collisions will occur on this link.

11. What is the primary function of encapsulating packets into frames?
Static
Source and Destination Ports
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

12. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
RJ-45
Rollover cable

13. Important characteristic of UDP
Ctrl + Shift + 6
Minimal delays in data delivery.
Application Layer
A physical topology.

14. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
172.16.192.160
A physical topology.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

15. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
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
Network portion
The physical address is added.

16. 3 properties of peer-2-peer applications
Signal loss can be experienced.
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

17. What is a component of a routing table entry?
They must wait until the first hosts finish transfering the media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
Next-Hop Address

18. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
It uses lasers as the light source.
Hosts return to listen-before-transmit mode.
No collisions will occur on this link.

19. What is the role of the OSI Application Layer?
A. they initiate data exchanges b. they may upload data to servers
Window Size
It provides interface between applications on either end of the network.
A physical topology.

20. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
SSH
Host A
A. larger address space b. data types and classes of service c. authentication and encryption

21. What is a characteristic of a single-mode fiber-optic cable?
SSH
A. larger address space b. data types and classes of service c. authentication and encryption
IP Protocol
It uses lasers as the light source.

22. 3 protocols that operate in the application layer
As the commands are entered.
32 bits
A physical topology.
A. DNS b. SMTP c. POP

23. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
80 (HTTP)
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. purpose b. geographic location c. ownership
Binary ANDing

24. 3 features that allow TCP to realibly and accurately track the transmission of data
Network address
A. decentralized resources b. resource sharing w/o a dedicated server
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. flow control b. session establishment c. numbering and sequencing

25. What device can check for faults - integrity and performance of media?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Flash
Console
OTDR

26. What info is found in the TCP and UDP header info?
172.16.192.160
Transport
The MAC protocol can be very simple.
Source and Destination Ports

27. What is the primary purpose of Layer 4?
Logical Link Control sublayer
Console
Network address
Identify processes or services that are communicating with end devices.

28. What are 2 commands used to view a host routing table?
Router
The physical address is added.
2046
A. netstat -r b. route PRINT

29. Why is flow control used for TCP data transfer?
A. copper UTP b. optical fiber
To prevent the receiver from being overwhelmed by incoming data.
80 (HTTP)
A. performance degradation b. security issues c. host identification

30. What do end devices do?
A. enable mode b. priviledge executive mode
UDP
It uses lasers as the light source.
Originate data flow.

31. What is an automated service that matches resource names w/ required IP addresses?
8
DNS
It provides interface between applications on either end of the network.
A random delay helps prevent the stations from experiencing another collision during transmission.

32. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
Console interface
Collisions can decrease network performance.
2046
Network

33. Which IP packet field will prevent endless loops?
DNS
Time-to-live (TTL)
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. identifies the communicating applications b. identifies multiple conversations between the hosts

34. What are 3 common problems w/ large networks?
A. enable mode b. priviledge executive mode
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. perform degradation b. security issues c. host identification
Host mobility

35. What is the primary reason for developing IPv6?
A. addressing b. error detection c. frame delimiting
It has expanded adressing capabilities.
No collisions will occur on this link.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

36. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
Destination is not contacted before a packet is sent.
Fiber
Signal loss can be experienced.

37. Which characteristics describe fiber optic cable?
Window Size
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. physical layer b. DLL layer
TCP initializes the sequence numbers for the sessions.

38. What information is added during encapsulation at OSI Layer 3?
A. replace a switch w/ a router b. subnet the new networks
To prevent the receiver from being overwhelmed by incoming data.
Network
Source and Destination IP address

39. What is dinamically selected by the source host when forwarding data?
Source Port
FTP
A default gateway (router).
Originate data flow.

40. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
A physical topology.
Signal loss can be experienced.
A. MTA b. SMTP

41. In business LANs - which connector is used w/ twisted-pair networking cable?
Source and Destination IP address
Hub
RJ-45
Identify processes or services that are communicating with end devices.

42. What is the role of MTA in handling email?
Collisions can decrease network performance.
Binary ANDing
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

43. Which combination of keys can be used to interrupt a ping or traceroute process?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Ctrl + Shift + 6
Any device whose backoff timer expires first.

44. During a TCP session - if packets arrive out of order - what will happen?
A. netstat -r b. route PRINT
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
The packets will be delivered and reassembled at destination.
The magnetic field around the adjacent pairs of wire.

45. What are the advantages of using a client-server model?
Source and Destination Ports
Application Layer
Network Layer
A. it has centralized administration b. security is easier to enforce

46. What networking devices are recommended to be assigned static IP addresses?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Minimal delays in data delivery.
A. servers b. routers c. network printers
Rollover cable

47. What event occurs during the 3-way handshake?
Create signals that represent the bits in each frame for the media.
A. hot keys b. context-sensitive c. command syntax check
A. application b. presentation c. session d. transmision e. network f. data link g. physical
TCP initializes the sequence numbers for the sessions.

48. What is a disadvantage of Telnet?
Window Size
To prevent the receiver from being overwhelmed by incoming data.
It does not support encryption.
The packets will be delivered and reassembled at destination.

49. What kind of problems are caused by excessive broadcast traffic on network segments?
0 to 1023
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. hot keys b. context-sensitive c. command syntax check
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

50. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Destination is not contacted before a packet is sent.
Logical Link Control sublayer
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment