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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. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
To enable a receiving host to forward the data to the appropriate application.
Network Layer Packet
It does not support encryption.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

2. Which characteristics describe fiber optic cable?
To facilitate the entry and exit of data on media.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Hosts return to listen-before-transmit mode.
FTP

3. What are key considering factors when grouping hosts into common networks?
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
A. application b. presentation c. session d. transmision e. network f. data link g. physical
To enable a receiving host to forward the data to the appropriate application.
A. purpose b. geographic location c. ownership

4. Which device is used to create or divide broadcast domains?
Router
A random delay helps prevent the stations from experiencing another collision during transmission.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
2046

5. In business LANs - which connector is used w/ twisted-pair networking cable?
255.255.255.224
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. the router will discard the packet b. the router will send a time exceeded message to the source host
RJ-45

6. 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. 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
Collisions can decrease network performance.
The packets will be delivered and reassembled at destination.
8

7. Which 2 options represent Layer 4 addressing?
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
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Layer Packet
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

8. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. application b. services
It uses lasers as the light source.
Hub

9. Which type of cable is most often associated w/ fiber-optic cable?
Console interface
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A backbone cable.

10. 3 primary functions of the data link layer encapsulation
2046
MAC
A. addressing b. error detection c. frame delimiting
Any device whose backoff timer expires first.

11. An admin needs to keep contents private - which access method should he use?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
SSH
Supports error detection.
A. servers b. routers c. network printers

12. If you have a small network w/ 3 computers...
UTP
Static
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
Resolve IPv4 addresses to MAC addresses.

13. What is the purpose of a default gateway?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
To enable a receiving host to forward the data to the appropriate application.
Binary ANDing
Identify the device that allows local network computers to communicate w/ devices in other networks.

14. Network Protocols
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
It provides interface between applications on either end of the network.
Console interface
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

15. When a device is moved from one network to the other...?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Console
Time-to-live (TTL)
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

16. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Console interface
A. router b. firewall
Host A
Network address

17. What is a default gateway address?

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18. At which layers of the OSI model does ethernet operate?
The magnetic field around the adjacent pairs of wire.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. physical layer b. DLL layer
UDP

19. 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?
Binary ANDing
They must wait until the first hosts finish transfering the media.
A. MTA b. SMTP
No collisions will occur on this link.

20. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. MTA b. SMTP
A. Physical b. Data Link
It uses lasers as the light source.
Time-to-live (TTL)

21. 3 functions of the upper data link sublayer in the OSI model
RJ-45
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Collisions can decrease network performance.
Transport

22. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Network portion
SMB
No collisions will occur on this link.
Hosts return to listen-before-transmit mode.

23. 3 terms that define the forms of help available within the Cisco IOS
Network portion
2046
It provides interface between applications on either end of the network.
A. hot keys b. context-sensitive c. command syntax check

24. What is the role of the OSI Application Layer?
Network Media Control
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
Source and Destination IP address
It provides interface between applications on either end of the network.

25. What can get you to an outside network?
A default gateway (router).
2046
Is used by the server to resolve names.
172.16.192.160

26. When a network service fails - which port is most often used to access a router for management purposes?
Source and Destination Ports
Fiber
Console
A backbone cable.

27. What is a component of a routing table entry?
IP is not properly installed
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
8
Next-Hop Address

28. 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.
It uses lasers as the light source.
A default gateway (router).
Network Access

29. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
8
IP is not properly installed
A. addressing b. error detection c. frame delimiting
255.255.255.224

30. 3 features that allow TCP to realibly and accurately track the transmission of data
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. flow control b. session establishment c. numbering and sequencing
When connecting a host to a switch.

31. What can be a problem that is reduced by adding end-to-end addressing?
A. next-hop b. metric/interface c. destination network address
It provides interface between applications on either end of the network.
Hub
It reduces unnecessary broadcasts.

32. 2 functions of encapsulation
Is used by the server to resolve names.
Source and Destination IP address
Router
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

33. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. copper UTP b. optical fiber
Is a layer of specific encapsulation.
Hosts return to listen-before-transmit mode.
0 to 1023

34. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Binary ANDing
Transport
Next-Hop Address
Source and Destination IP address

35. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
255.255.255.224
Create signals that represent the bits in each frame for the media.
Physical

36. 3 features of IPv6
A random delay helps prevent the stations from experiencing another collision during transmission.
Network
Window Size
A. larger address space b. data types and classes of service c. authentication and encryption

37. What device can check for faults - integrity and performance of media?
DNS
OTDR
IP is not properly installed
UDP

38. What makes fiber preferable to copper for interconnecting buildings?
It uses lasers as the light source.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A physical topology.
Physical

39. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
172.16.192.160
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It does not support encryption.

40. When do changes take effect in a Cisco router?
Resolve IPv4 addresses to MAC addresses.
Twisting of the cables
Rollover cable
As the commands are entered.

41. What 2 type of cables would most commonly be used for new runs?
A. minimizing of collisions b. division into broadcast domains
A. Cat5 UTP b. Cat6 UTP
255.255.255.0
Hosts return to listen-before-transmit mode.

42. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Destination is not contacted before a packet is sent.
A random delay helps prevent the stations from experiencing another collision during transmission.

43. What info is found in the TCP and UDP header info?
Network Layer Packet
A. Physical b. Data Link
DNS
Source and Destination Ports

44. Which combination of keys can be used to interrupt a ping or traceroute process?
IP Protocol
Time-to-live (TTL)
Ctrl + Shift + 6
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

45. 3 properties of peer-2-peer applications
A default gateway (router).
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
Static
A. flow control b. session establishment c. numbering and sequencing

46. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. addressing b. error detection c. frame delimiting
A random delay helps prevent the stations from experiencing another collision during transmission.
8
A default gateway (router).

47. 3 factors that should be considered when implementing Layer 2 protocols
TCP initializes the sequence numbers for the sessions.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The address of the router that the host will use to 'get to the other side'.
Logical Link Control sublayer

48. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
0 to 1023
MAC
Network Media Control

49. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
Host mobility
A. show startup-config b. show running-config
Signal loss can be experienced.

50. What is a protocol that provides connectionless network layer services?
Source Port
80 (HTTP)
Any device whose backoff timer expires first.
IP Protocol