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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. In a connectionless system - What is correct?
It provides for the exchange of data over a common local media.
Time-to-live (TTL)
Host A
Destination is not contacted before a packet is sent.

2. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It uses lasers as the light source.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network Access

3. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
DNS
TCP initializes the sequence numbers for the sessions.
MAC
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

4. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
Network Access
It uses lasers as the light source.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

5. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Physical
Show Interfaces
SMB

6. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
OTDR
A. DB 60 b. Winchester 15-pin c. smart serial

7. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
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
255.255.255.224
Router
DNS

8. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Resolve IPv4 addresses to MAC addresses.
Switch
A. hot keys b. context-sensitive c. command syntax check

9. Default Gateway is incorrect on the host - What is the impact on the communications?
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. media sharing b. logical topology

10. 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?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Host A
A. media sharing b. logical topology
It uses support from the lower layers to distinguish between connections to the service.

11. During a TCP session - if packets arrive out of order - what will happen?
DNS
The packets will be delivered and reassembled at destination.
Collisions can decrease network performance.
Network Media Control

12. How many bits make up an IPv4 address?
OTDR
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
32 bits
A. non-deterministic b. less overhead c. collisions exist

13. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
To facilitate the entry and exit of data on media.
FTP
Ctrl + Shift + 6

14. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Router
The packets will be delivered and reassembled at destination.
A. DNS b. SMTP c. POP

15. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
The magnetic field around the adjacent pairs of wire.
Any device whose backoff timer expires first.
Fiber
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

16. What is PDU?
Binary ANDing
Is a layer of specific encapsulation.
Signal loss can be experienced.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

17. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
The packets will be delivered and reassembled at destination.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

18. Which type of cable is most often associated w/ fiber-optic cable?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. non-deterministic b. less overhead c. collisions exist
A backbone cable.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

19. What application layer protocol is used to support file transfers between client and server?
When connecting a host to a switch.
UTP
FTP
Supports error detection.

20. 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?
Fiber
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
2046

21. What are 2 forms of application layer software?
Logical Link Control sublayer
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
A. application b. services
Create signals that represent the bits in each frame for the media.

22. Which IP packet field will prevent endless loops?
Switch
Time-to-live (TTL)
A. Physical b. Data Link
A. enable mode b. priviledge executive mode

23. What is the purpose of resource records in DNS?
Rollover cable
Is used by the server to resolve names.
Hub
To prevent the receiver from being overwhelmed by incoming data.

24. 3 primary functions of the data link layer encapsulation
A. it has centralized administration b. security is easier to enforce
A. addressing b. error detection c. frame delimiting
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
They must wait until the first hosts finish transfering the media.

25. 2 characteristics of peer-2-peer
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
255.255.255.224
A. Cat5 UTP b. Cat6 UTP
A. decentralized resources b. resource sharing w/o a dedicated server

26. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. DB 60 b. Winchester 15-pin c. smart serial
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. goodput b. throughput c. bandwidth
UDP

27. 3 common problems w/ a large network
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
0 to 1023
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. performance degradation b. security issues c. host identification

28. What are key considering factors when grouping hosts into common networks?
Router(config)# interface FastEthernet 0/1
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A random delay helps prevent the stations from experiencing another collision during transmission.
A. purpose b. geographic location c. ownership

29. What determines the method of media access control?
A. media sharing b. logical topology
A. they initiate data exchanges b. they may upload data to servers
Twisting of the cables
As the commands are entered.

30. What can get you to an outside network?
Any device whose backoff timer expires first.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Source and Destination Ports
A default gateway (router).

31. 3 properties of peer-2-peer applications
A. perform degradation b. security issues c. host identification
DNS
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)

32. 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?
The physical address is added.
MAC
Source Port
A. show startup-config b. show running-config

33. 3 statements about routes and their use
Show Interfaces
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
255.255.255.224
Static

34. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Rollover cable
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. DB 60 b. Winchester 15-pin c. smart serial
Any device whose backoff timer expires first.

35. 3 statements of media acess control
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

36. What is a component of a routing table entry?
8
It has expanded adressing capabilities.
Logical Link Control sublayer
Next-Hop Address

37. What is an effect of improperly applying a network cable connector?
The magnetic field around the adjacent pairs of wire.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network Layer
Signal loss can be experienced.

38. Why are port numbers included in the TCP header of a segment?
Console
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
To enable a receiving host to forward the data to the appropriate application.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

39. What do you need to use for an initial configuration on a Cisco router?
Console interface
Is used by the server to resolve names.
As the commands are entered.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

40. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. media sharing b. logical topology
A. physical layer b. DLL layer
A. enable mode b. priviledge executive mode

41. What is a default gateway address?

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42. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. next-hop b. metric/interface c. destination network address
Minimal delays in data delivery.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

43. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Router(config)# interface FastEthernet 0/1
255.255.255.0
A. the router will discard the packet b. the router will send a time exceeded message to the source host
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

44. What information is added during encapsulation at OSI Layer 3?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Source and Destination IP address
80 (HTTP)
The destination host address.

45. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
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. Physical b. Data Link
Show Interfaces
A. media sharing b. logical topology

46. Statements that describe LAN
A. flow control b. session establishment c. numbering and sequencing
Source Port
Flash
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

47. What are the advantages of using a client-server model?
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. hot keys b. context-sensitive c. command syntax check
A. it has centralized administration b. security is easier to enforce
MAC

48. What is the primary purpose of Layer 4?
A. next-hop b. metric/interface c. destination network address
Identify processes or services that are communicating with end devices.
Router
A. MTA b. SMTP

49. 3 statements about the role of routers in the network
Is a layer of specific encapsulation.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Next-Hop Address
A. larger address space b. data types and classes of service c. authentication and encryption

50. 3 facts about the network portion of an IPv4 address
MAC
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Supports error detection.