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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. 3 factors that should be considered when implementing Layer 2 protocols
Create signals that represent the bits in each frame for the media.
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
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. non-deterministic b. less overhead c. collisions exist

2. What is the primary function of encapsulating packets into frames?
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
Source Port
To facilitate the entry and exit of data on media.
Flash

3. 3 terms that define the forms of help available within the Cisco IOS
Network Layer Packet
A. hot keys b. context-sensitive c. command syntax check
A. show startup-config b. show running-config
IP is not properly installed

4. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The physical address is added.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

5. What are 2 common characteristics associated w/ dynamic routing protocols?
To facilitate the entry and exit of data on media.
Source Port
Any device whose backoff timer expires first.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

6. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A backbone cable.
Window Size
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. Physical b. Data Link

7. What layer encapsulates segments into packets?
FTP
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.
Network Layer

8. When destination network is not in the routing table - What are 2 actions the router might take?
Network
Create signals that represent the bits in each frame for the media.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

9. What can get you to an outside network?
Network portion
The magnetic field around the adjacent pairs of wire.
A. non-deterministic b. less overhead c. collisions exist
A default gateway (router).

10. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
It reduces unnecessary broadcasts.
A. next-hop b. metric/interface c. destination network address
The packets will be delivered and reassembled at destination.
UDP

11. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
A. Cat5 UTP b. Cat6 UTP
It provides for the exchange of data over a common local media.
Source and Destination IP address

12. What statements describe the logical token-passing topology?
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
FTP
To facilitate the entry and exit of data on media.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

13. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Is a layer of specific encapsulation.
Fiber
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Time-to-live (TTL)

14. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. non-deterministic b. less overhead c. collisions exist
Network Media Control

15. What is a characteristic of a logical point-to-point topology?
IP is not properly installed
Destination is not contacted before a packet is sent.
Destination Network Address
The MAC protocol can be very simple.

16. When a network service fails - which port is most often used to access a router for management purposes?
255.255.255.0
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
Is used by the server to resolve names.
Console

17. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Supports error detection.
Switch
Network Access
No collisions will occur on this link.

18. 3 properties of peer-2-peer applications
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. minimizing of collisions b. division into broadcast domains
Minimal delays in data delivery.
Network Layer Packet

19. If you have a small network w/ 3 computers...
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
80 (HTTP)
UTP
The physical address is added.

20. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
Is a layer of specific encapsulation.
A. HTTP b. HTTPS
A. show startup-config b. show running-config
Host A

21. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
MAC
Hosts return to listen-before-transmit mode.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

22. What correctly describes a MAC address?
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
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
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

23. 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. minimizing of collisions b. division into broadcast domains
RJ-45
Host A
172.16.192.160

24. Which layer supplies services and allows user interface?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer Packet
172.16.192.160
Application Layer

25. Which type of cable is most often associated w/ fiber-optic cable?
It provides for the exchange of data over a common local media.
RJ-45
SSH
A backbone cable.

26. After an ethernet collision - which device has priority to transmit data?
255.255.255.0
SSH
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Any device whose backoff timer expires first.

27. How many bits make up an IPv4 address?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
32 bits
A. performance degradation b. security issues c. host identification
Hosts return to listen-before-transmit mode.

28. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Minimal delays in data delivery.
IP is not properly installed
Originate data flow.
To facilitate the entry and exit of data on media.

29. Where is the IOS file stored at?
OTDR
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Router
Flash

30. What info is found in the TCP and UDP header info?
Rollover cable
Fiber
Source and Destination Ports
The packets will be delivered and reassembled at destination.

31. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
Fiber
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

32. 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
Logical Link Control sublayer
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
Static

33. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Source and Destination Ports
Source Port
Network address
Static

34. An admin needs to keep contents private - which access method should he use?
SSH
Show Interfaces
Console
A. enable mode b. priviledge executive mode

35. 2 features that make switches preferable to hubs
255.255.255.224
A. minimizing of collisions b. division into broadcast domains
It provides for the exchange of data over a common local media.
172.16.192.160

36. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. minimizing of collisions b. division into broadcast domains
Flash
Router(config)# interface FastEthernet 0/1
Is used by the server to resolve names.

37. Which device is used to create or divide broadcast domains?
Router
Rollover cable
IP is not properly installed
UDP

38. 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.
A. DNS b. SMTP c. POP
A. netstat -r b. route PRINT
Identify processes or services that are communicating with end devices.

39. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
OTDR
The MAC protocol can be very simple.
80 (HTTP)
A physical topology.

40. 3 statements about routes and their use
A default gateway (router).
The magnetic field around the adjacent pairs of wire.
When connecting a host to a switch.
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

41. What causes crosstalk within cable pairs when using UTP?
Network
A. router b. firewall
Wireless
The magnetic field around the adjacent pairs of wire.

42. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. flow control b. session establishment c. numbering and sequencing
A. HTTP b. HTTPS
The address of the router that the host will use to 'get to the other side'.
Hosts return to listen-before-transmit mode.

43. What type of network cable is used between a terminal and a console port?
When connecting a host to a switch.
Rollover cable
A. application b. services
A. addressing b. error detection c. frame delimiting

44. What is the purpose of a default gateway?
A. application b. services
A. non-deterministic b. less overhead c. collisions exist
The address of the router that the host will use to 'get to the other side'.
Identify the device that allows local network computers to communicate w/ devices in other networks.

45. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
The magnetic field around the adjacent pairs of wire.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
255.255.255.0
Time-to-live (TTL)

46. What is a default gateway address?

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47. What is the function of the DLL?
It provides for the exchange of data over a common local media.
The physical address is added.
Signal loss can be experienced.
It uses support from the lower layers to distinguish between connections to the service.

48. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. decentralized resources b. resource sharing w/o a dedicated server
80 (HTTP)
255.255.255.224

49. 3 statements of media acess control
A. flow control b. session establishment c. numbering and sequencing
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
Originate data flow.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

50. Statements that describe LAN
The MAC protocol can be very simple.
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 random delay helps prevent the stations from experiencing another collision during transmission.
Logical Link Control sublayer