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. When do changes take effect in a Cisco router?
UTP
Supports error detection.
SSH
As the commands are entered.

2. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
Fiber
DNS
SSH

3. Which characteristics describe fiber optic cable?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Window Size
A. Cat5 UTP b. Cat6 UTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling

4. What can be a problem that is reduced by adding end-to-end addressing?
A. addressing b. error detection c. frame delimiting
2046
It reduces unnecessary broadcasts.
Resolve IPv4 addresses to MAC addresses.

5. Which 2 options represent Layer 4 addressing?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Transport
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. next-hop b. metric/interface c. destination network address

6. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Binary ANDing
A. not affected by EMI of RFI b. most expensive type of LAN cabling
RJ-45

7. Which combination of keys can be used to interrupt a ping or traceroute process?
Host mobility
Ctrl + Shift + 6
80 (HTTP)
To prevent the receiver from being overwhelmed by incoming data.

8. What is a drawback of the CSMA/CD access method?
A. router b. firewall
Application Layer
Collisions can decrease network performance.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

9. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. flow control b. session establishment c. numbering and sequencing
Rollover cable
A. addressing b. error detection c. frame delimiting

10. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
A. netstat -r b. route PRINT
Physical
A. router b. firewall

11. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A backbone cable.
Destination Network Address
A. router b. firewall
255.255.255.0

12. Default Gateway is incorrect on the host - What is the impact on the communications?
A. DB 60 b. Winchester 15-pin c. smart serial
To prevent the receiver from being overwhelmed by incoming data.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network Media Control

13. 3 statements of media acess control
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Is a layer of specific encapsulation.

14. What is the role of MTA in handling email?
A. low overhead b. connectionless
UTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The MAC protocol can be very simple.

15. What connectors are commonly associated w/ Cisco's V.35 serial cables?
UDP
A. replace a switch w/ a router b. subnet the new networks
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. DB 60 b. Winchester 15-pin c. smart serial

16. What causes crosstalk within cable pairs when using UTP?
A. hot keys b. context-sensitive c. command syntax check
The magnetic field around the adjacent pairs of wire.
Collisions can decrease network performance.
Network Access

17. What is the function of the DLL?
8
A. next-hop b. metric/interface c. destination network address
It provides for the exchange of data over a common local media.
255.255.255.0

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. performance degradation b. security issues c. host identification
8
Host A
It provides interface between applications on either end of the network.

19. What is the purpose of a default gateway?
It uses lasers as the light source.
Resolve IPv4 addresses to MAC addresses.
A. purpose b. geographic location c. ownership
Identify the device that allows local network computers to communicate w/ devices in other networks.

20. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
The destination host address.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. addressing b. error detection c. frame delimiting
IP is not properly installed

21. What layer encapsulates segments into packets?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer
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

22. Which IP packet field will prevent endless loops?
The MAC protocol can be very simple.
Time-to-live (TTL)
It reduces unnecessary broadcasts.
Router(config)# hostname Costas

23. What info is found in the TCP and UDP header info?
Host A
Source and Destination Ports
A. router b. firewall
A. Cat5 UTP b. Cat6 UTP

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?
OTDR
Show Interfaces
MAC
80 (HTTP)

25. What 2 type of cables would most commonly be used for new runs?
Flash
Source and Destination Ports
It provides for the exchange of data over a common local media.
A. Cat5 UTP b. Cat6 UTP

26. In a connectionless system - What is correct?
A. Physical b. Data Link
A. hot keys b. context-sensitive c. command syntax check
Destination is not contacted before a packet is sent.
Window Size

27. Where is the IOS file stored at?
Flash
A. Physical b. Data Link
A. they initiate data exchanges b. they may upload data to servers
A. goodput b. throughput c. bandwidth

28. What type of network cable is used between a terminal and a console port?
A. MTA b. SMTP
Console
Flash
Rollover cable

29. 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
A. non-deterministic b. less overhead c. collisions exist
8
Is a layer of specific encapsulation.

30. What can you identify when you examine the Network Layer header?
172.16.192.160
The destination host address.
Minimal delays in data delivery.
A. low overhead b. connectionless

31. What is the primary purpose of Layer 4?
It uses support from the lower layers to distinguish between connections to the service.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Identify processes or services that are communicating with end devices.
A. Cat5 UTP b. Cat6 UTP

32. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. it has centralized administration b. security is easier to enforce
Binary ANDing
A. netstat -r b. route PRINT
Network Layer

33. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
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
A. identifies the communicating applications b. identifies multiple conversations between the hosts
UTP

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 physical topology.
A. hot keys b. context-sensitive c. command syntax check
Physical

35. What do you need to use for an initial configuration on a Cisco router?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Source Port
Window Size
Console interface

36. If you have a small network w/ 3 computers...
UDP
FTP
Show Interfaces
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

37. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The MAC protocol can be very simple.
A. goodput b. throughput c. bandwidth
Router(config)# interface FastEthernet 0/1

38. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
A. purpose b. geographic location c. ownership
Twisting of the cables
UDP

39. How many bits make up an IPv4 address?
It does not support encryption.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
32 bits
Hosts return to listen-before-transmit mode.

40. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Show Interfaces
It has expanded adressing capabilities.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. enable mode b. priviledge executive mode

41. Which portion of the network layer address does a router use to forward packets?
UDP
A. low overhead b. connectionless
Network portion
DNS

42. What command is used to change the default name to 'Costas'?
The address of the router that the host will use to 'get to the other side'.
Static
A. next-hop b. metric/interface c. destination network address
Router(config)# hostname Costas

43. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
IP Protocol
Router(config)# hostname Costas
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

44. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Logical Link Control sublayer
The address of the router that the host will use to 'get to the other side'.
Hub
MAC

45. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

46. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The MAC protocol can be very simple.
A. flow control b. session establishment c. numbering and sequencing

47. Important characteristic of UDP
Minimal delays in data delivery.
Switch
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Originate data flow.

48. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
UDP
Application Layer
A random delay helps prevent the stations from experiencing another collision during transmission.
Binary ANDing

49. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
0 to 1023
Network portion
A. application b. services

50. When is a straight-through cable used in a network?
Destination Network Address
It uses support from the lower layers to distinguish between connections to the service.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
When connecting a host to a switch.