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. Which portion of the network layer address does a router use to forward packets?
Any device whose backoff timer expires first.
Network portion
Source and Destination IP address
When connecting a host to a switch.

2. What type of routing uses information that is manually entered into the routing table?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It uses support from the lower layers to distinguish between connections to the service.
255.255.255.0
Static

3. Intermediary devices used to implement security between networks
A. flow control b. session establishment c. numbering and sequencing
A. router b. firewall
RJ-45
The packets will be delivered and reassembled at destination.

4. What correctly describes a MAC address?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
8
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. enable mode b. priviledge executive mode

5. What method of signal transmission uses radio waves to carry signals?
Is used by the server to resolve names.
Wireless
2046
The magnetic field around the adjacent pairs of wire.

6. What networking devices are recommended to be assigned static IP addresses?
A. HTTP b. HTTPS
A. servers b. routers c. network printers
A physical topology.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

7. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
A. purpose b. geographic location c. ownership
Router(config)# interface FastEthernet 0/1
Router

8. What are 2 forms of application layer software?
A. application b. services
Time-to-live (TTL)
Ctrl + Shift + 6
A. flow control b. session establishment c. numbering and sequencing

9. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. router b. firewall
FTP
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The address of the router that the host will use to 'get to the other side'.

10. What is an effect of improperly applying a network cable connector?
A. application b. services
Network Access
Signal loss can be experienced.
172.16.192.160

11. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
A. netstat -r b. route PRINT
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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 are 3 common problems w/ large networks?
A default gateway (router).
A. perform degradation b. security issues c. host identification
A. larger address space b. data types and classes of service c. authentication and encryption
Minimal delays in data delivery.

13. Network Protocols
Source and Destination Ports
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network
A. next-hop b. metric/interface c. destination network address

14. What is a characteristic of a logical point-to-point topology?
Destination is not contacted before a packet is sent.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The MAC protocol can be very simple.
To prevent the receiver from being overwhelmed by incoming data.

15. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. application b. presentation c. session d. transmision e. network f. data link g. physical
UTP

16. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
The physical address is added.
UTP
Binary ANDing
A. identifies the communicating applications b. identifies multiple conversations between the hosts

17. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Logical Link Control sublayer
The magnetic field around the adjacent pairs of wire.

18. What determines the method of media access control?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. media sharing b. logical topology
It reduces unnecessary broadcasts.
Time-to-live (TTL)

19. What type of network cable is used between a terminal and a console port?
SMB
Originate data flow.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Rollover cable

20. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
UDP
Supports error detection.
A. hot keys b. context-sensitive c. command syntax check
A. application b. services

21. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Router(config)# hostname Costas
TCP initializes the sequence numbers for the sessions.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. show startup-config b. show running-config

22. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
To facilitate the entry and exit of data on media.
The packets will be delivered and reassembled at destination.

23. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Network
Wireless
A. hot keys b. context-sensitive c. command syntax check

24. 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?
8
A. non-deterministic b. less overhead c. collisions exist
SMB
It provides for the exchange of data over a common local media.

25. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
32 bits
The packets will be delivered and reassembled at destination.
Supports error detection.
255.255.255.0

26. What command is used to change the default name to 'Costas'?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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. physical layer b. DLL layer
Router(config)# hostname Costas

27. 3 statements of media acess control
A. larger address space b. data types and classes of service c. authentication and encryption
To facilitate the entry and exit of data on media.
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
Ctrl + Shift + 6

28. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
It uses lasers as the light source.
Hosts return to listen-before-transmit 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
Network Layer Packet

29. 2 characteristics of clients in data networks
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
When connecting a host to a switch.
A. they initiate data exchanges b. they may upload data to servers
Network portion

30. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
2046
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

31. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
To enable a receiving host to forward the data to the appropriate application.
Network address
Destination Network Address
80 (HTTP)

32. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
255.255.255.0
A. netstat -r b. route PRINT
A. physical layer b. DLL layer

33. What is a characteristic of a single-mode fiber-optic cable?
A. purpose b. geographic location c. ownership
It uses lasers as the light source.
As the commands are entered.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

34. To make a console connection from a comp to a Cisco router - what cable should be used?
MAC
A. DNS b. SMTP c. POP
Rollover cable
It provides for the exchange of data over a common local media.

35. 3 terms that define the forms of help available within the Cisco IOS
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
Logical Link Control sublayer
A. hot keys b. context-sensitive c. command syntax check
Application Layer

36. What information is added during encapsulation at OSI Layer 3?
UDP
Source and Destination IP address
A. replace a switch w/ a router b. subnet the new networks
IP Protocol

37. What is the primary purpose of Layer 4?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Identify processes or services that are communicating with end devices.
OTDR
Wireless

38. What is the primary function of encapsulating packets into frames?
Destination is not contacted before a packet is sent.
Console
To facilitate the entry and exit of data on media.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

39. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
Destination Network Address
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
Originate data flow.

40. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Any device whose backoff timer expires first.
It reduces unnecessary broadcasts.
UTP

41. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Hosts return to listen-before-transmit mode.
Window Size
Hub
A. application b. presentation c. session d. transmision e. network f. data link g. physical

42. An admin needs to keep contents private - which access method should he use?
A. DNS b. SMTP c. POP
Host A
SSH
A. it has centralized administration b. security is easier to enforce

43. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
Source and Destination Ports
Ctrl + Shift + 6
To enable a receiving host to forward the data to the appropriate application.

44. At which layers of the OSI model does ethernet operate?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. it has centralized administration b. security is easier to enforce
A. physical layer b. DLL layer
A. hot keys b. context-sensitive c. command syntax check

45. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
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
Originate data flow.
The destination host address.
80 (HTTP)

46. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Switch
Logical Link Control sublayer
Network portion

47. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Time-to-live (TTL)
Flash
Console interface
Router(config)# interface FastEthernet 0/1

48. When do changes take effect in a Cisco router?
As the commands are entered.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. HTTP b. HTTPS
0 to 1023

49. What is a default gateway address?

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50. What is the function of the DLL?
A. addressing b. error detection c. frame delimiting
A. purpose b. geographic location c. ownership
It has expanded adressing capabilities.
It provides for the exchange of data over a common local media.