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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. What device can check for faults - integrity and performance of media?
Host A
255.255.255.0
OTDR
Originate data flow.

2. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Physical
It uses lasers as the light source.
Router(config)# interface FastEthernet 0/1

3. Which layer supplies services and allows user interface?
A. Physical b. Data Link
Identify processes or services that are communicating with end devices.
Application Layer
It uses lasers as the light source.

4. What causes crosstalk within cable pairs when using UTP?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Wireless
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The magnetic field around the adjacent pairs of wire.

5. What is PDU?
UTP
Is a layer of specific encapsulation.
Host A
A default gateway (router).

6. What application layer protocol is used to support file transfers between client and server?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
FTP
Create signals that represent the bits in each frame for the media.
It does not support encryption.

7. In a connectionless system - What is correct?
A. hot keys b. context-sensitive c. command syntax check
A. HTTP b. HTTPS
It provides interface between applications on either end of the network.
Destination is not contacted before a packet is sent.

8. What do end devices do?
Network Layer Packet
Originate data flow.
The magnetic field around the adjacent pairs of wire.
FTP

9. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
Network address
A. physical layer b. DLL layer
Is a layer of specific encapsulation.

10. What are 3 common problems w/ large networks?
A. it has centralized administration b. security is easier to enforce
A. perform degradation b. security issues c. host identification
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

11. 3 statements of media acess control
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
The destination host address.
IP Protocol
80 (HTTP)

12. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
IP is not properly installed
A. physical layer b. DLL layer
Resolve IPv4 addresses to MAC addresses.
UDP

13. What are 2 email components used to forward mail between servers?
Supports error detection.
A. MTA b. SMTP
Fiber
The packets will be delivered and reassembled at destination.

14. During encapsulation - what happens in the Data Link Layer?
Network Layer Packet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The physical address is added.
A. show startup-config b. show running-config

15. What correctly describes a MAC address?
A. DB 60 b. Winchester 15-pin c. smart serial
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Flash
The physical address is added.

16. How does the application layer on a server process multiple client requests for services?
2046
It uses support from the lower layers to distinguish between connections to the service.
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

17. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. performance degradation b. security issues c. host identification
Router(config)# hostname Costas
Wireless
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

18. If there is a graphic representation of a company network wiring and equipment - What is this called?
Wireless
When connecting a host to a switch.
A physical topology.
They must wait until the first hosts finish transfering the media.

19. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Static
172.16.192.160
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. not affected by EMI of RFI b. most expensive type of LAN cabling

20. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
Application Layer
A. netstat -r b. route PRINT
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

21. Statements that describe LAN
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Is a layer of specific encapsulation.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
To facilitate the entry and exit of data on media.

22. What is the purpose of a default gateway?
It reduces unnecessary broadcasts.
A. media sharing b. logical topology
Identify the device that allows local network computers to communicate w/ devices in other networks.
Window Size

23. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
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
MAC
Router(config)# interface FastEthernet 0/1
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

24. What do you need to use for an initial configuration on a Cisco router?
Console interface
UTP
A. perform degradation b. security issues c. host identification
A. low overhead b. connectionless

25. What command can be used to determine if the router has experienced any input or output errors?
A. perform degradation b. security issues c. host identification
It uses lasers as the light source.
Show Interfaces
TCP initializes the sequence numbers for the sessions.

26. 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?
FTP
The address of the router that the host will use to 'get to the other side'.
Host A
A. decentralized resources b. resource sharing w/o a dedicated server

27. Default Gateway is incorrect on the host - What is the impact on the communications?
As the commands are entered.
Source and Destination Ports
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Signal loss can be experienced.

28. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
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. 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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

29. 2 features that make switches preferable to hubs
It uses support from the lower layers to distinguish between connections to the service.
A. non-deterministic b. less overhead c. collisions exist
A. minimizing of collisions b. division into broadcast domains
It provides interface between applications on either end of the network.

30. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
The packets will be delivered and reassembled at destination.
It reduces unnecessary broadcasts.
SMB

31. 3 factors that should be considered when implementing Layer 2 protocols
A. enable mode b. priviledge executive mode
A. DNS b. SMTP c. POP
IP Protocol
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

32. What type of routing uses information that is manually entered into the routing table?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network portion
Static
Next-Hop Address

33. What is a default gateway address?

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34. 3 measures of data transfer
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
A. goodput b. throughput c. bandwidth
A. it has centralized administration b. security is easier to enforce
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

35. What are 2 commands used to view a host routing table?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. hot keys b. context-sensitive c. command syntax check
A. netstat -r b. route PRINT
Network Access

36. Intermediary devices used to implement security between networks
MAC
A. router b. firewall
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Binary ANDing

37. 3 features that allow TCP to realibly and accurately track the transmission of data
Next-Hop Address
A. larger address space b. data types and classes of service c. authentication and encryption
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. flow control b. session establishment c. numbering and sequencing

38. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. purpose b. geographic location c. ownership
Console
A. identifies the communicating applications b. identifies multiple conversations between the hosts

39. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
They must wait until the first hosts finish transfering the media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Ctrl + Shift + 6

40. At which layers of the OSI model does ethernet operate?
A. Cat5 UTP b. Cat6 UTP
Network Layer
Network
A. physical layer b. DLL layer

41. What is the function of the DLL?
A. show startup-config b. show running-config
It provides for the exchange of data over a common local media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The MAC protocol can be very simple.

42. What 2 type of cables would most commonly be used for new runs?
A. servers b. routers c. network printers
A. Cat5 UTP b. Cat6 UTP
MAC
A. DNS b. SMTP c. POP

43. When do changes take effect in a Cisco router?
Fiber
Rollover cable
Network Layer
As the commands are entered.

44. What method of signal transmission uses radio waves to carry signals?
Network
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It uses lasers as the light source.
Wireless

45. What information is added during encapsulation at OSI Layer 3?
When connecting a host to a switch.
Transport
Source and Destination IP address
Collisions can decrease network performance.

46. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
FTP
Hub
A. HTTP b. HTTPS

47. 3 statements about routes and their use
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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
A. physical layer b. DLL layer
A. addressing b. error detection c. frame delimiting

48. Why is flow control used for TCP data transfer?
A. servers b. routers c. network printers
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
To prevent the receiver from being overwhelmed by incoming data.
Console interface

49. What determines the method of media access control?
Logical Link Control sublayer
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Console interface
A. media sharing b. logical topology

50. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Access
A. netstat -r b. route PRINT
It reduces unnecessary broadcasts.