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. What is dinamically selected by the source host when forwarding data?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Destination Network Address
Source Port
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

2. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Signal loss can be experienced.
DNS
Hub
Flash

3. What makes fiber preferable to copper for interconnecting buildings?
Rollover cable
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Destination Network Address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

4. 3 characteristics of valid Ethernet Layer 2 addresses
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
MAC
A. DB 60 b. Winchester 15-pin c. smart serial
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

5. 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?
Host mobility
2046
OTDR
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

6. Which characteristics describe fiber optic cable?
Signal loss can be experienced.
To facilitate the entry and exit of data on media.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. copper UTP b. optical fiber

7. 3 statements of media acess control
A. enable mode b. priviledge executive mode
Network portion
A. decentralized resources b. resource sharing w/o a dedicated server
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

8. If you have a small network w/ 3 computers...
Rollover cable
A. flow control b. session establishment c. numbering and sequencing
Router
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

9. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
32 bits
Source and Destination Ports
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

10. Why is flow control used for TCP data transfer?
When connecting a host to a switch.
To prevent the receiver from being overwhelmed by incoming data.
Ctrl + Shift + 6
Fiber

11. What is the purpose of resource records in DNS?
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
A. physical layer b. DLL layer
Is used by the server to resolve names.

12. What is the role of the OSI Application Layer?
SSH
A. media sharing b. logical topology
A physical topology.
It provides interface between applications on either end of the network.

13. Default Gateway is incorrect on the host - What is the impact on the communications?
A. performance degradation b. security issues c. host identification
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Ctrl + Shift + 6
The physical address is added.

14. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Binary ANDing
A. media sharing b. logical topology
IP is not properly installed

15. What is the purpose of a default gateway?
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. they initiate data exchanges b. they may upload data to servers
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

16. 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?
172.16.192.160
Is used by the server to resolve names.
Physical
255.255.255.224

17. What device can check for faults - integrity and performance of media?
OTDR
A. addressing b. error detection c. frame delimiting
Hub
SSH

18. What are 2 common characteristics associated w/ dynamic routing protocols?
The packets will be delivered and reassembled at destination.
Network
It uses support from the lower layers to distinguish between connections to the service.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

19. What type of network cable is used between a terminal and a console port?
Physical
Console interface
Rollover cable
It has expanded adressing capabilities.

20. What statements describe the logical token-passing topology?
A. purpose b. geographic location c. ownership
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Physical
A. non-deterministic b. less overhead c. collisions exist

21. What is a benefit of a WAN?
A backbone cable.
It reduces unnecessary broadcasts.
A. Physical b. Data Link
Host mobility

22. In a connectionless system - What is correct?
Create signals that represent the bits in each frame for the media.
Destination is not contacted before a packet is sent.
255.255.255.0
A. application b. services

23. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. Cat5 UTP b. Cat6 UTP
Supports error detection.
Ctrl + Shift + 6

24. When destination network is not in the routing table - What are 2 actions the router might take?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network
Host mobility
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

25. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It provides interface between applications on either end of the network.
Supports error detection.
8
Is used by the server to resolve names.

26. 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.
Supports error detection.
Any device whose backoff timer expires first.
A. next-hop b. metric/interface c. destination network address

27. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. application b. services
A random delay helps prevent the stations from experiencing another collision during transmission.
Originate data flow.
0 to 1023

28. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
80 (HTTP)
Router(config)# interface FastEthernet 0/1
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

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

30. 2 characteristics of clients in data networks
Physical
A. DNS b. SMTP c. POP
Router
A. they initiate data exchanges b. they may upload data to servers

31. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. non-deterministic b. less overhead c. collisions exist
A physical topology.
Transport
It does not support encryption.

32. After an ethernet collision - which device has priority to transmit data?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. HTTP b. HTTPS
Any device whose backoff timer expires first.

33. What is a characteristic of a logical point-to-point topology?
Wireless
2046
Network Layer
The MAC protocol can be very simple.

34. 3 facts about the network portion of an IPv4 address
Router
Wireless
A. MTA b. SMTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

35. What command is used to change the default name to 'Costas'?
Ctrl + Shift + 6
A. physical layer b. DLL layer
Switch
Router(config)# hostname Costas

36. What 2 type of cables would most commonly be used for new runs?
80 (HTTP)
UDP
A. Cat5 UTP b. Cat6 UTP
To prevent the receiver from being overwhelmed by incoming data.

37. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A default gateway (router).
A. netstat -r b. route PRINT
Hosts return to listen-before-transmit mode.
Router(config)# interface FastEthernet 0/1

38. 3 functions of the upper data link sublayer in the OSI model
A. next-hop b. metric/interface c. destination network address
Signal loss can be experienced.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The magnetic field around the adjacent pairs of wire.

39. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
80 (HTTP)
255.255.255.0
It uses support from the lower layers to distinguish between connections to the service.
Twisting of the cables

40. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
Binary ANDing
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. performance degradation b. security issues c. host identification

41. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
IP is not properly installed
IP Protocol
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

42. What are 2 protocols for transfering web resources?
Next-Hop Address
A. HTTP b. HTTPS
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Application Layer

43. What can get you to an outside network?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A default gateway (router).
Router(config)# interface FastEthernet 0/1
Host mobility

44. Statements that describe LAN
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. enable mode b. priviledge executive mode

45. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
A. servers b. routers c. network printers
IP is not properly installed
When connecting a host to a switch.

46. What type of routing uses information that is manually entered into the routing table?
Rollover cable
Static
Hosts return to listen-before-transmit mode.
Binary ANDing

47. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A random delay helps prevent the stations from experiencing another collision during transmission.
The MAC protocol can be very simple.
Transport
Hub

48. What method of signal transmission uses radio waves to carry signals?
Source Port
Wireless
A. perform degradation b. security issues c. host identification
A. physical layer b. DLL layer

49. How many bits make up an IPv4 address?
Console
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. 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
32 bits

50. An admin needs to keep contents private - which access method should he use?
A. minimizing of collisions b. division into broadcast domains
SSH
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. flow control b. session establishment c. numbering and sequencing