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. 3 features that allow TCP to realibly and accurately track the transmission of data
A. media sharing b. logical topology
Host mobility
A. flow control b. session establishment c. numbering and sequencing
Router(config)# interface FastEthernet 0/1

2. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. it has centralized administration b. security is easier to enforce
A. next-hop b. metric/interface c. destination network address
A. copper UTP b. optical fiber
Fiber

3. Network Protocols
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. performance degradation b. security issues c. host identification
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

4. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
TCP initializes the sequence numbers for the sessions.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network Layer
255.255.255.224

5. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
To facilitate the entry and exit of data on media.
Physical
A. enable mode b. priviledge executive mode

6. Default Gateway is incorrect on the host - What is the impact on the communications?
As the commands are entered.
It does not support encryption.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

7. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
Supports error detection.
Minimal delays in data delivery.
2046

8. 3 statements about routes and their use
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
MAC
Console interface
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

9. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Physical
A. hot keys b. context-sensitive c. command syntax check
Ctrl + Shift + 6

10. What is the primary reason for developing IPv6?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Binary ANDing
A. minimizing of collisions b. division into broadcast domains
It has expanded adressing capabilities.

11. At which layers of the OSI model does ethernet operate?
To facilitate the entry and exit of data on media.
172.16.192.160
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. physical layer b. DLL layer

12. There are too many broadcasts on switches - what can be done?
A. netstat -r b. route PRINT
Create signals that represent the bits in each frame for the media.
Ctrl + Shift + 6
A. replace a switch w/ a router b. subnet the new networks

13. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
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
SSH
Identify the device that allows local network computers to communicate w/ devices in other networks.

14. What command can be used to determine if the router has experienced any input or output errors?
Host A
Show Interfaces
A. media sharing b. logical topology
Ctrl + Shift + 6

15. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Router
Supports error detection.
The packets will be delivered and reassembled at destination.
Originate data flow.

16. Intermediary devices used to implement security between networks
Source and Destination IP address
A. router b. firewall
Flash
It does not support encryption.

17. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Hosts return to listen-before-transmit mode.
To facilitate the entry and exit of data on media.

18. 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. application b. presentation c. session d. transmision e. network f. data link g. physical
It uses support from the lower layers to distinguish between connections to the service.
A. servers b. routers c. network printers
8

19. What is PDU?
A physical topology.
Is a layer of specific encapsulation.
Resolve IPv4 addresses to MAC addresses.
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

20. What is a default gateway address?

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21. If you have a small network w/ 3 computers...
A. replace a switch w/ a router b. subnet the new networks
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
Show Interfaces
No collisions will occur on this link.

22. What correctly describes a MAC address?
A backbone cable.
Collisions can decrease network performance.
172.16.192.160
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

23. Important characteristic of UDP
A. Physical b. Data Link
Signal loss can be experienced.
Minimal delays in data delivery.
The address of the router that the host will use to 'get to the other side'.

24. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
172.16.192.160
80 (HTTP)
The MAC protocol can be very simple.
The address of the router that the host will use to 'get to the other side'.

25. What characteristic of an UTP helps reduce interference?
TCP initializes the sequence numbers for the sessions.
Twisting of the cables
UDP
A. application b. services

26. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. enable mode b. priviledge executive mode
Signal loss can be experienced.

27. Why are port numbers included in the TCP header of a segment?
A. hot keys b. context-sensitive c. command syntax check
The packets will be delivered and reassembled at destination.
To enable a receiving host to forward the data to the appropriate application.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

28. If you have a full-duplex operational network - what can happen?
Source and Destination IP address
A. purpose b. geographic location c. ownership
Create signals that represent the bits in each frame for the media.
No collisions will occur on this link.

29. What are 3 properties of contention-based media access for a shared media?
8
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. non-deterministic b. less overhead c. collisions exist
Source and Destination IP address

30. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
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
Network Layer Packet
A. Physical b. Data Link
A. decentralized resources b. resource sharing w/o a dedicated server

31. What is a characteristic of a logical point-to-point topology?
A. low overhead b. connectionless
It uses lasers as the light source.
The MAC protocol can be very simple.
Switch

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?
A. Physical b. Data Link
Network Media Control
Hub
2046

33. 2 functions of encapsulation
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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
Physical
It has expanded adressing capabilities.

34. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. minimizing of collisions b. division into broadcast domains
A. hot keys b. context-sensitive c. command syntax check
Collisions can decrease network performance.

35. Which type of cable is most often associated w/ fiber-optic cable?
Switch
Source Port
A. netstat -r b. route PRINT
A backbone cable.

36. What are key considering factors when grouping hosts into common networks?
Physical
A. purpose b. geographic location c. ownership
Router(config)# hostname Costas
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

37. During a TCP session - if packets arrive out of order - what will happen?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Hub
A. netstat -r b. route PRINT
The packets will be delivered and reassembled at destination.

38. Which characteristics describe fiber optic cable?
Fiber
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. MTA b. SMTP
Network Media Control

39. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
RJ-45
Switch
A. the router will discard the packet b. the router will send a time exceeded message to the source host

40. Where is the IOS file stored at?
Rollover cable
Flash
Fiber
It reduces unnecessary broadcasts.

41. What do you need to use for an initial configuration on a Cisco router?
Hosts return to listen-before-transmit mode.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Console interface
A. decentralized resources b. resource sharing w/o a dedicated server

42. When a device is moved from one network to the other...?
80 (HTTP)
Router(config)# hostname Costas
A. purpose b. geographic location c. ownership
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

43. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Host A
The packets will be delivered and reassembled at destination.
A. low overhead b. connectionless

44. When a network service fails - which port is most often used to access a router for management purposes?
Console
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
2046
TCP initializes the sequence numbers for the sessions.

45. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
A. decentralized resources b. resource sharing w/o a dedicated server
Originate data flow.
A. they initiate data exchanges b. they may upload data to servers

46. 2 characteristics of clients in data networks
The address of the router that the host will use to 'get to the other side'.
A. they initiate data exchanges b. they may upload data to servers
OTDR
80 (HTTP)

47. What info is found in the TCP and UDP header info?
Router
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Source and Destination Ports

48. What is the primary rope of the physical layer in transmitting data?
Ctrl + Shift + 6
Create signals that represent the bits in each frame for the media.
TCP initializes the sequence numbers for the sessions.
A. goodput b. throughput c. bandwidth

49. When destination network is not in the routing table - What are 2 actions the router might take?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Static
A. servers b. routers c. network printers

50. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
It provides for the exchange of data over a common local media.
Host A
Switch
A. physical layer b. DLL layer