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 OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Host A
Network Layer
Identify processes or services that are communicating with end devices.
Physical

2. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Fiber
A. show startup-config b. show running-config
SSH

3. When do changes take effect in a Cisco router?
As the commands are entered.
UDP
A. not affected by EMI of RFI b. most expensive type of LAN cabling
To enable a receiving host to forward the data to the appropriate application.

4. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Identify processes or services that are communicating with end devices.
A. enable mode b. priviledge executive mode
Transport
Destination Network Address

5. 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.
A. it has centralized administration b. security is easier to enforce
Minimal delays in data delivery.
A. HTTP b. HTTPS

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

7. What is a characteristic of a logical point-to-point topology?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To facilitate the entry and exit of data on media.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
The MAC protocol can be very simple.

8. 3 terms that define the forms of help available within the Cisco IOS
A. they initiate data exchanges b. they may upload data to servers
A. hot keys b. context-sensitive c. command syntax check
Console interface
A. physical layer b. DLL layer

9. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. flow control b. session establishment c. numbering and sequencing

10. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Show Interfaces

11. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. performance degradation b. security issues c. host identification
A. Physical b. Data Link
A. identifies the communicating applications b. identifies multiple conversations between the hosts

12. 3 properties of peer-2-peer applications
A. purpose b. geographic location c. ownership
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. replace a switch w/ a router b. subnet the new networks
8

13. What does the IEEE 802.2 standard represent in Ethernet technologies?
Network portion
Transport
RJ-45
Logical Link Control sublayer

14. To make a console connection from a comp to a Cisco router - what cable should be used?
Hosts return to listen-before-transmit mode.
Is used by the server to resolve names.
Rollover cable
When connecting a host to a switch.

15. 3 common problems w/ a large network
Network Layer
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network address
A. performance degradation b. security issues c. host identification

16. How does the application layer on a server process multiple client requests for services?
Is a layer of specific encapsulation.
It uses support from the lower layers to distinguish between connections to the service.
UTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

17. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
RJ-45
Console interface
Router
Network address

18. What is the primary rope of the physical layer in transmitting data?
Transport
Create signals that represent the bits in each frame for the media.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
IP Protocol

19. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Host A
Router
Network Layer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

20. What can be a problem that is reduced by adding end-to-end addressing?
The physical address is added.
A default gateway (router).
It reduces unnecessary broadcasts.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

21. What is a protocol that provides connectionless network layer services?
A. servers b. routers c. network printers
IP Protocol
DNS
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

22. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Rollover cable
IP is not properly installed
Router
Source and Destination IP address

23. What is dinamically selected by the source host when forwarding data?
Source Port
It provides interface between applications on either end of the network.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

24. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
It provides interface between applications on either end of the network.
Flash
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

25. 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. DB 60 b. Winchester 15-pin c. smart serial
Destination Network Address
8
Identify processes or services that are communicating with end devices.

26. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. Physical b. Data Link
MAC
As the commands are entered.

27. What is the primary function of encapsulating packets into frames?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
To facilitate the entry and exit of data on media.
Any device whose backoff timer expires first.
A. minimizing of collisions b. division into broadcast domains

28. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
No collisions will occur on this link.
Source Port

29. What type of routing uses information that is manually entered into the routing table?
They must wait until the first hosts finish transfering the media.
Static
Signal loss can be experienced.
Wireless

30. What are 2 commands used to view a host routing table?
A. HTTP b. HTTPS
A. netstat -r b. route PRINT
0 to 1023
Collisions can decrease network performance.

31. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
The physical address is added.
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
RJ-45
80 (HTTP)

32. What are 2 forms of application layer software?
Network Layer Packet
It provides for the exchange of data over a common local media.
A. application b. services
DNS

33. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
A. enable mode b. priviledge executive mode
Console interface
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

34. After an ethernet collision - which device has priority to transmit data?
It has expanded adressing capabilities.
Network address
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Any device whose backoff timer expires first.

35. What are the advantages of using a client-server model?
Network address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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. it has centralized administration b. security is easier to enforce

36. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
SMB
UDP
Network

37. What info is found in the TCP and UDP header info?
Time-to-live (TTL)
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Switch
Source and Destination Ports

38. 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?
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
Any device whose backoff timer expires first.
It reduces unnecessary broadcasts.
A. show startup-config b. show running-config

39. What is a benefit of a WAN?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The packets will be delivered and reassembled at destination.
Host mobility
A. next-hop b. metric/interface c. destination network address

40. 2 characteristics of peer-2-peer
A. next-hop b. metric/interface c. destination network address
Console interface
A. decentralized resources b. resource sharing w/o a dedicated server
A. minimizing of collisions b. division into broadcast domains

41. What is the primary purpose of Layer 4?
2046
Destination is not contacted before a packet is sent.
Identify processes or services that are communicating with end devices.
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

42. What layer encapsulates segments into packets?
It does not support encryption.
Destination is not contacted before a packet is sent.
A. physical layer b. DLL layer
Network Layer

43. What is a component of a routing table entry?
Network Layer Packet
Static
Next-Hop Address
RJ-45

44. When a network service fails - which port is most often used to access a router for management purposes?
The packets will be delivered and reassembled at destination.
UDP
Network Layer
Console

45. What are 3 pieces of info about a route contained in a routing table?
A. servers b. routers c. network printers
SSH
A. next-hop b. metric/interface c. destination network address
Originate data flow.

46. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
The MAC protocol can be very simple.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
The packets will be delivered and reassembled at destination.

47. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
No collisions will occur on this link.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Source Port

48. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Binary ANDing
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

49. What can get you to an outside network?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A default gateway (router).
Twisting of the cables
Resolve IPv4 addresses to MAC addresses.

50. What is a drawback of the CSMA/CD access method?
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.
Logical Link Control sublayer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.