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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 do you need to use for an initial configuration on a Cisco router?
Console interface
A default gateway (router).
Signal loss can be experienced.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

2. When is a straight-through cable used in a network?
It reduces unnecessary broadcasts.
32 bits
When connecting a host to a switch.
IP Protocol

3. Why are port numbers included in the TCP header of a segment?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A backbone cable.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
To enable a receiving host to forward the data to the appropriate application.

4. What is a protocol that provides connectionless network layer services?
IP Protocol
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It provides interface between applications on either end of the network.

5. What are the advantages of using a client-server model?
A. netstat -r b. route PRINT
Source and Destination Ports
A. it has centralized administration b. security is easier to enforce
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

6. What is a component of a routing table entry?
Is used by the server to resolve names.
It reduces unnecessary broadcasts.
Physical
Next-Hop Address

7. 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?
MAC
To facilitate the entry and exit of data on media.
The physical address is added.
8

8. If you have a full-duplex operational network - what can happen?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
No collisions will occur on this link.
Source and Destination IP address
Flash

9. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
Transport
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Application Layer

10. 3 factors that should be considered when implementing Layer 2 protocols
A. HTTP b. HTTPS
Hub
Router(config)# interface FastEthernet 0/1
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

11. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
A. minimizing of collisions b. division into broadcast domains
Resolve IPv4 addresses to MAC addresses.
IP is not properly installed

12. 3 facts about the network portion of an IPv4 address
Next-Hop Address
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. Cat5 UTP b. Cat6 UTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

13. Which layer supplies services and allows user interface?
Application Layer
Hub
0 to 1023
Network

14. What does the IEEE 802.2 standard represent in Ethernet technologies?
No collisions will occur on this link.
Logical Link Control sublayer
The physical address is added.
A. servers b. routers c. network printers

15. Which IP packet field will prevent endless loops?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Time-to-live (TTL)
When connecting a host to a switch.
Application Layer

16. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
255.255.255.224
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It reduces unnecessary broadcasts.

17. What is the primary rope of the physical layer in transmitting data?
It provides for the exchange of data over a common local media.
A. MTA b. SMTP
Create signals that represent the bits in each frame for the media.
MAC

18. What kind of problems are caused by excessive broadcast traffic on network segments?
Create signals that represent the bits in each frame for the media.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

19. What is a drawback of the CSMA/CD access method?
As the commands are entered.
Minimal delays in data delivery.
Collisions can decrease network performance.
Rollover cable

20. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. low overhead b. connectionless
0 to 1023
Host A
Destination Network Address

21. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
Application Layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. show startup-config b. show running-config

22. What are 2 features of User Diagram Protocol (UDP)?
Signal loss can be experienced.
A. decentralized resources b. resource sharing w/o a dedicated server
A. low overhead b. connectionless
Wireless

23. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
Console
A. performance degradation b. security issues c. host identification
To prevent the receiver from being overwhelmed by incoming data.

24. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
RJ-45
Router(config)# interface FastEthernet 0/1
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
Logical Link Control sublayer

25. In business LANs - which connector is used w/ twisted-pair networking cable?
A. non-deterministic b. less overhead c. collisions exist
Supports error detection.
RJ-45
A backbone cable.

26. 2 features that make switches preferable to hubs
A. decentralized resources b. resource sharing w/o a dedicated server
Network Layer Packet
A. minimizing of collisions b. division into broadcast domains
A. servers b. routers c. network printers

27. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
The MAC protocol can be very simple.
Ctrl + Shift + 6
UTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

28. What 2 type of cables would most commonly be used for new runs?
Wireless
A. Cat5 UTP b. Cat6 UTP
They must wait until the first hosts finish transfering the media.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

29. statements of IP adressing
A. Physical b. Data Link
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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
OTDR

30. At which layer of the TCP/IP model does ethernet operate?
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
Network Access
Router
32 bits

31. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
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
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

32. What are 2 forms of application layer software?
UDP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
To facilitate the entry and exit of data on media.
A. application b. services

33. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
8
A. Physical b. Data Link
Network

34. 3 terms that define the forms of help available within the Cisco IOS
RJ-45
A. hot keys b. context-sensitive c. command syntax check
Router(config)# hostname Costas
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

35. 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?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The packets will be delivered and reassembled at destination.
SMB
172.16.192.160

36. 3 statements of media acess control
Time-to-live (TTL)
Network Layer Packet
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
32 bits

37. What networking devices are recommended to be assigned static IP addresses?
A. physical layer b. DLL layer
A backbone cable.
A. servers b. routers c. network printers
Source Port

38. 3 measures of data transfer
Next-Hop Address
A. goodput b. throughput c. bandwidth
A random delay helps prevent the stations from experiencing another collision during transmission.
A. servers b. routers c. network printers

39. After an ethernet collision - which device has priority to transmit data?
It has expanded adressing capabilities.
Any device whose backoff timer expires first.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
To enable a receiving host to forward the data to the appropriate application.

40. At which layers of the OSI model does ethernet operate?
SMB
To enable a receiving host to forward the data to the appropriate application.
A. physical layer b. DLL layer
Physical

41. What info is found in the TCP and UDP header info?
A. performance degradation b. security issues c. host identification
No collisions will occur on this link.
Wireless
Source and Destination Ports

42. Statements that describe LAN
Next-Hop Address
8
A. decentralized resources b. resource sharing w/o a dedicated server
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

43. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. performance degradation b. security issues c. host identification
Fiber
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
MAC

44. When destination network is not in the routing table - What are 2 actions the router might take?
Resolve IPv4 addresses to MAC addresses.
IP is not properly installed
8
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

45. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A random delay helps prevent the stations from experiencing another collision during transmission.
32 bits

46. 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.
Window Size
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

47. What is the purpose of the preamble in an ethernet frame?
It does not support encryption.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network
Fiber

48. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
255.255.255.224
A. perform degradation b. security issues c. host identification
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

49. What device can check for faults - integrity and performance of media?
OTDR
Hosts return to listen-before-transmit mode.
Any device whose backoff timer expires first.
Network

50. 3 features that allow TCP to realibly and accurately track the transmission of data
A. purpose b. geographic location c. ownership
A. flow control b. session establishment c. numbering and sequencing
A. hot keys b. context-sensitive c. command syntax check
It uses support from the lower layers to distinguish between connections to the service.