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 makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
IP is not properly installed
As the commands are entered.
It provides interface between applications on either end of the network.

2. What is a default gateway address?

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3. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Binary ANDing
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Window Size
A. not affected by EMI of RFI b. most expensive type of LAN cabling

4. What are 2 forms of application layer software?
A physical topology.
It uses support from the lower layers to distinguish between connections to the service.
A. application b. services
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

5. In a connectionless system - What is correct?
Application Layer
Destination is not contacted before a packet is sent.
A. goodput b. throughput c. bandwidth
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

6. 3 factors that should be considered when implementing Layer 2 protocols
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Identify processes or services that are communicating with end devices.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
2046

7. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
32 bits
Rollover cable
255.255.255.0

8. What type of network cable is used between a terminal and a console port?
Rollover cable
A. MTA b. SMTP
A. they initiate data exchanges b. they may upload data to servers
Identify processes or services that are communicating with end devices.

9. Which IP packet field will prevent endless loops?
It uses support from the lower layers to distinguish between connections to the service.
Time-to-live (TTL)
Console
A. show startup-config b. show running-config

10. 3 statements about routes and their use
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Rollover cable
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
The physical address is added.

11. 3 common problems w/ a large network
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. performance degradation b. security issues c. host identification
Fiber
Network address

12. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
They must wait until the first hosts finish transfering the media.
It has expanded adressing capabilities.
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
255.255.255.0

13. What command is used to change the default name to 'Costas'?
The packets will be delivered and reassembled at destination.
Router(config)# hostname Costas
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Switch

14. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Originate data flow.
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
0 to 1023
UTP

15. An admin needs to keep contents private - which access method should he use?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A default gateway (router).
SSH
Network Layer

16. Intermediary devices used to implement security between networks
0 to 1023
No collisions will occur on this link.
A. router b. firewall
8

17. What is PDU?
Is a layer of specific encapsulation.
Switch
MAC
80 (HTTP)

18. What are the advantages of using a client-server model?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. flow control b. session establishment c. numbering and sequencing
A. it has centralized administration b. security is easier to enforce
SMB

19. How does the application layer on a server process multiple client requests for services?
Any device whose backoff timer expires first.
It uses support from the lower layers to distinguish between connections to the service.
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
80 (HTTP)

20. Why are port numbers included in the TCP header of a segment?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
FTP
To enable a receiving host to forward the data to the appropriate application.
Host A

21. statements of IP adressing
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
It uses support from the lower layers to distinguish between connections to the service.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A backbone cable.

22. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. it has centralized administration b. security is easier to enforce
Router(config)# hostname Costas

23. What is a protocol that provides connectionless network layer services?
It provides interface between applications on either end of the network.
TCP initializes the sequence numbers for the sessions.
IP Protocol
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

24. What can you identify when you examine the Network Layer header?
A. goodput b. throughput c. bandwidth
No collisions will occur on this link.
A physical topology.
The destination host address.

25. What event occurs during the 3-way handshake?
A. purpose b. geographic location c. ownership
Network Layer
TCP initializes the sequence numbers for the sessions.
Hosts return to listen-before-transmit mode.

26. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
255.255.255.224
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. hot keys b. context-sensitive c. command syntax check

27. What is the role of the OSI Application Layer?
172.16.192.160
Signal loss can be experienced.
A. non-deterministic b. less overhead c. collisions exist
It provides interface between applications on either end of the network.

28. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network

29. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Switch
Router
Router(config)# hostname Costas
A random delay helps prevent the stations from experiencing another collision during transmission.

30. What type of routing uses information that is manually entered into the routing table?
255.255.255.224
Static
Is a layer of specific encapsulation.
Logical Link Control sublayer

31. What characteristic of an UTP helps reduce interference?
A. hot keys b. context-sensitive c. command syntax check
Twisting of the cables
Source and Destination Ports
8

32. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Any device whose backoff timer expires first.
Flash
IP is not properly installed
UTP

33. 3 functions of the upper data link sublayer in the OSI model
Console interface
A. larger address space b. data types and classes of service c. authentication and encryption
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

34. What info is found in the TCP and UDP header info?
Source and Destination Ports
Physical
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Console

35. What determines the method of media access control?
It has expanded adressing capabilities.
A. media sharing b. logical topology
Network Media Control
Originate data flow.

36. Which portion of the network layer address does a router use to forward packets?
It reduces unnecessary broadcasts.
Network portion
Hosts return to listen-before-transmit mode.
A. Physical b. Data Link

37. At which layers of the OSI model does ethernet operate?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. enable mode b. priviledge executive mode
A. physical layer b. DLL layer
Resolve IPv4 addresses to MAC addresses.

38. Which combination of keys can be used to interrupt a ping or traceroute process?
Time-to-live (TTL)
A. purpose b. geographic location c. ownership
A. DNS b. SMTP c. POP
Ctrl + Shift + 6

39. During encapsulation - what happens in the Data Link Layer?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The physical address is added.
It provides for the exchange of data over a common local media.
Router(config)# interface FastEthernet 0/1

40. 3 statements about the role of routers in the network
A. HTTP b. HTTPS
A. it has centralized administration b. security is easier to enforce
A random delay helps prevent the stations from experiencing another collision during transmission.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

41. What is an automated service that matches resource names w/ required IP addresses?
DNS
Hub
A. addressing b. error detection c. frame delimiting
As the commands are entered.

42. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Flash
Supports error detection.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

43. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Window Size
Any device whose backoff timer expires first.
MAC
Network Layer Packet

44. Default Gateway is incorrect on the host - What is the impact on the communications?
They must wait until the first hosts finish transfering the media.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. application b. services
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

45. What is a characteristic of a logical point-to-point topology?
MAC
SMB
A. show startup-config b. show running-config
The MAC protocol can be very simple.

46. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Host A
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
172.16.192.160

47. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. performance degradation b. security issues c. host identification
Router(config)# interface FastEthernet 0/1
IP is not properly installed
A. MTA b. SMTP

48. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A backbone cable.
A. enable mode b. priviledge executive mode
8
IP is not properly installed

49. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
MAC
255.255.255.0
FTP
Next-Hop Address

50. What device can check for faults - integrity and performance of media?
OTDR
Network Layer Packet
255.255.255.0
As the commands are entered.