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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 makes fiber preferable to copper for interconnecting buildings?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
DNS
To enable a receiving host to forward the data to the appropriate application.

2. What is the primary reason for developing IPv6?
IP Protocol
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Is used by the server to resolve names.
It has expanded adressing capabilities.

3. What networking devices are recommended to be assigned static IP addresses?
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. router b. firewall
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. servers b. routers c. network printers

4. Which IP packet field will prevent endless loops?
0 to 1023
A. next-hop b. metric/interface c. destination network address
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Time-to-live (TTL)

5. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
It has expanded adressing capabilities.
OTDR
Console interface

6. Default Gateway is incorrect on the host - What is the impact on the communications?
Ctrl + Shift + 6
Identify processes or services that are communicating with end devices.
Is a layer of specific encapsulation.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

7. When is a straight-through cable used in a network?
When connecting a host to a switch.
Host mobility
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Transport

8. Which characteristics describe fiber optic cable?
When connecting a host to a switch.
A. purpose b. geographic location c. ownership
Show Interfaces
A. not affected by EMI of RFI b. most expensive type of LAN cabling

9. What method of signal transmission uses radio waves to carry signals?
Network Layer Packet
Wireless
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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

10. What 2 type of cables would most commonly be used for new runs?
It reduces unnecessary broadcasts.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Logical Link Control sublayer
A. Cat5 UTP b. Cat6 UTP

11. Statements that describe LAN
IP is not properly installed
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
The packets will be delivered and reassembled at destination.
A. DB 60 b. Winchester 15-pin c. smart serial

12. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A default gateway (router).
Is a layer of specific encapsulation.
32 bits

13. What can get you to an outside network?
Rollover cable
Source Port
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 default gateway (router).

14. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
It reduces unnecessary broadcasts.
A physical topology.
UTP
172.16.192.160

15. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. Cat5 UTP b. Cat6 UTP
A. media sharing b. logical topology
Router(config)# hostname Costas
Router(config)# interface FastEthernet 0/1

16. What is the role of MTA in handling email?
It does not support encryption.
A. media sharing b. logical topology
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The destination host address.

17. Intermediary devices used to implement security between networks
It uses support from the lower layers to distinguish between connections to the service.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. router b. firewall
It reduces unnecessary broadcasts.

18. 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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
8
Hub
A. non-deterministic b. less overhead c. collisions exist

19. Which layer supplies services and allows user interface?
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
Application Layer
No collisions will occur on this link.
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

20. 3 protocols that operate in the application layer
Router(config)# hostname Costas
Next-Hop Address
RJ-45
A. DNS b. SMTP c. POP

21. What is a characteristic of a single-mode fiber-optic cable?
Router(config)# hostname Costas
Identify the device that allows local network computers to communicate w/ devices in other networks.
They must wait until the first hosts finish transfering the media.
It uses lasers as the light source.

22. What is the primary rope of the physical layer in transmitting data?
A. performance degradation b. security issues c. host identification
Create signals that represent the bits in each frame for the media.
UTP
Binary ANDing

23. 2 characteristics of peer-2-peer
A. media sharing b. logical topology
A. decentralized resources b. resource sharing w/o a dedicated server
IP Protocol
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

24. What is a default gateway address?

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25. 3 factors that should be considered when implementing Layer 2 protocols
0 to 1023
FTP
It reduces unnecessary broadcasts.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

26. There are too many broadcasts on switches - what can be done?
A. they initiate data exchanges b. they may upload data to servers
IP is not properly installed
A. DNS b. SMTP c. POP
A. replace a switch w/ a router b. subnet the new networks

27. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Identify processes or services that are communicating with end devices.
A. router b. firewall
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

28. 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?
Fiber
Supports error detection.
Network portion
Host A

29. What is PDU?
Host A
Console interface
When connecting a host to a switch.
Is a layer of specific encapsulation.

30. Why are port numbers included in the TCP header of a segment?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Static
To enable a receiving host to forward the data to the appropriate application.
Identify the device that allows local network computers to communicate w/ devices in other networks.

31. What info is found in the TCP and UDP header info?
Source and Destination Ports
Network Layer
The address of the router that the host will use to 'get to the other side'.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

32. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
RJ-45
Time-to-live (TTL)
A. copper UTP b. optical fiber

33. What is the primary purpose of ARP?
Physical
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Resolve IPv4 addresses to MAC addresses.

34. What is the purpose of resource records in DNS?
Window Size
Network Access
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Is used by the server to resolve names.

35. What is the primary function of encapsulating packets into frames?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To facilitate the entry and exit of data on media.
A. MTA b. SMTP
Source Port

36. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Physical
A. router b. firewall
255.255.255.224
Destination Network Address

37. What determines the method of media access control?
A. media sharing b. logical topology
It does not support encryption.
A. goodput b. throughput c. bandwidth
Fiber

38. What statements describe the logical token-passing topology?
Window Size
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It has expanded adressing capabilities.
Show Interfaces

39. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network address
Hosts return to listen-before-transmit mode.
Rollover cable

40. When a network service fails - which port is most often used to access a router for management purposes?
A. HTTP b. HTTPS
Console
They must wait until the first hosts finish transfering the media.
It reduces unnecessary broadcasts.

41. 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
Any device whose backoff timer expires first.
A. they initiate data exchanges b. they may upload data to servers
Network Layer Packet

42. Which portion of the network layer address does a router use to forward packets?
Signal loss can be experienced.
A. application b. services
A. non-deterministic b. less overhead c. collisions exist
Network portion

43. 3 statements of media acess control
0 to 1023
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. 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
Destination is not contacted before a packet is sent.

44. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
0 to 1023
It provides for the exchange of data over a common local media.
Logical Link Control sublayer

45. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Static
A. it has centralized administration b. security is easier to enforce
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Binary ANDing

46. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. physical layer b. DLL layer
Hosts return to listen-before-transmit mode.
Identify the device that allows local network computers to communicate w/ devices in other networks.

47. What is a protocol that provides connectionless network layer services?
The MAC protocol can be very simple.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
IP Protocol

48. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
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
It uses lasers as the light source.
Rollover cable

49. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
Source and Destination Ports
To enable a receiving host to forward the data to the appropriate application.
A. DNS b. SMTP c. POP

50. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Router
Resolve IPv4 addresses to MAC addresses.
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