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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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 a small network w/ 3 computers...
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. 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
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

2. 2 most commonly used media types in ethernet networks
Originate data flow.
Window Size
Destination Network Address
A. copper UTP b. optical fiber

3. 3 common problems w/ a large network
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
UDP
Any device whose backoff timer expires first.
A. performance degradation b. security issues c. host identification

4. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
The physical address is added.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
DNS
Show Interfaces

5. What method of signal transmission uses radio waves to carry signals?
Window Size
Is used by the server to resolve names.
Wireless
Host A

6. What is the purpose of a default gateway?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Source and Destination Ports
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. goodput b. throughput c. bandwidth

7. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. MTA b. SMTP
A. servers b. routers c. network printers
255.255.255.224
Hub

8. What are 2 protocols for transfering web resources?
8
TCP initializes the sequence numbers for the sessions.
A. DNS b. SMTP c. POP
A. HTTP b. HTTPS

9. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. goodput b. throughput c. bandwidth
A. netstat -r b. route PRINT
A physical topology.
A. non-deterministic b. less overhead c. collisions exist

10. What is PDU?
Is a layer of specific encapsulation.
Ctrl + Shift + 6
Hosts return to listen-before-transmit mode.
32 bits

11. What is the function of the DLL?
UTP
Network portion
It provides for the exchange of data over a common local media.
A. goodput b. throughput c. bandwidth

12. Which portion of the network layer address does a router use to forward packets?
Network Access
Network portion
A. next-hop b. metric/interface c. destination network address
Router(config)# interface FastEthernet 0/1

13. What is the purpose of the TCP/IP Network Application Layer?
It provides for the exchange of data over a common local media.
To prevent the receiver from being overwhelmed by incoming data.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Media Control

14. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It uses support from the lower layers to distinguish between connections to the service.
Next-Hop Address
Create signals that represent the bits in each frame for the media.

15. How does the application layer on a server process multiple client requests for services?
Identify processes or services that are communicating with end devices.
It uses support from the lower layers to distinguish between connections to the service.
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
UTP

16. 3 statements about the role of routers in the network
UDP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Transport
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

17. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. Cat5 UTP b. Cat6 UTP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network address

18. What can you identify when you examine the Network Layer header?
A. Cat5 UTP b. Cat6 UTP
Host A
A physical topology.
The destination host address.

19. What is an effect of improperly applying a network cable connector?
A. larger address space b. data types and classes of service c. authentication and encryption
Source and Destination Ports
Signal loss can be experienced.
IP is not properly installed

20. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Wireless
A. router b. firewall
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Binary ANDing

21. What are 2 features of User Diagram Protocol (UDP)?
Network Layer Packet
A. low overhead b. connectionless
No collisions will occur on this link.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

22. 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?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Time-to-live (TTL)
They must wait until the first hosts finish transfering the media.
Console

23. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
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. low overhead b. connectionless
Network Access

24. 3 measures of data transfer
A. enable mode b. priviledge executive mode
A. decentralized resources b. resource sharing w/o a dedicated server
A. goodput b. throughput c. bandwidth
Is used by the server to resolve names.

25. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
DNS
The address of the router that the host will use to 'get to the other side'.
Minimal delays in data delivery.

26. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
As the commands are entered.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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

27. What statements describe the logical token-passing topology?
It provides for the exchange of data over a common local media.
FTP
Network Layer
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

28. Intermediary devices used to implement security between networks
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
FTP
A. router b. firewall
Time-to-live (TTL)

29. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Static
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

30. 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?
A. Physical b. Data Link
Any device whose backoff timer expires first.
Resolve IPv4 addresses to MAC addresses.
2046

31. Which IP packet field will prevent endless loops?
The packets will be delivered and reassembled at destination.
Time-to-live (TTL)
Logical Link Control sublayer
A default gateway (router).

32. Default Gateway is incorrect on the host - What is the impact on the communications?
It uses support from the lower layers to distinguish between connections to the service.
A. minimizing of collisions b. division into broadcast domains
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. they initiate data exchanges b. they may upload data to servers

33. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Host A
A random delay helps prevent the stations from experiencing another collision during transmission.
OTDR
The magnetic field around the adjacent pairs of wire.

34. After an ethernet collision - which device has priority to transmit data?
A. non-deterministic b. less overhead c. collisions exist
Network Media Control
Any device whose backoff timer expires first.
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

35. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
A. next-hop b. metric/interface c. destination network address
A. servers b. routers c. network printers
Source and Destination IP address

36. What can be a problem that is reduced by adding end-to-end addressing?
Collisions can decrease network performance.
Console
It reduces unnecessary broadcasts.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

37. What do the intermediary devices in the network do?
A. netstat -r b. route PRINT
The packets will be delivered and reassembled at destination.
The destination host address.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

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 default gateway (router).
A. show startup-config b. show running-config
A. hot keys b. context-sensitive c. command syntax check
Console interface

39. What are 2 commands used to view a host routing table?
Source and Destination IP address
Console
A. netstat -r b. route PRINT
A. perform degradation b. security issues c. host identification

40. What determines the method of media access control?
It uses lasers as the light source.
A. they initiate data exchanges b. they may upload data to servers
A. media sharing b. logical topology
The MAC protocol can be very simple.

41. There are too many broadcasts on switches - what can be done?
UDP
To enable a receiving host to forward the data to the appropriate application.
Host mobility
A. replace a switch w/ a router b. subnet the new networks

42. When a device is moved from one network to the other...?
Network Layer
Network portion
A. Physical b. Data Link
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

43. What application layer protocol is used to support file transfers between client and server?
UDP
FTP
32 bits
Show Interfaces

44. What is a protocol that provides connectionless network layer services?
IP Protocol
A backbone cable.
To facilitate the entry and exit of data on media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

45. What are 3 common problems w/ large networks?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
A. they initiate data exchanges b. they may upload data to servers
A. perform degradation b. security issues c. host identification

46. statements of IP adressing
A. show startup-config b. show running-config
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
It provides for the exchange of data over a common local media.
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

47. What do end devices do?
It does not support encryption.
A default gateway (router).
Minimal delays in data delivery.
Originate data flow.

48. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Identify processes or services that are communicating with end devices.
A. Physical b. Data Link
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
Network address

49. What is the primary rope of the physical layer in transmitting data?
It provides interface between applications on either end of the network.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Create signals that represent the bits in each frame for the media.
Signal loss can be experienced.

50. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. servers b. routers c. network printers
FTP
Destination is not contacted before a packet is sent.

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CCNA - 2

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