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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. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
They must wait until the first hosts finish transfering the media.
A. minimizing of collisions b. division into broadcast domains
Source and Destination Ports

2. 3 primary functions of the data link layer encapsulation
A. hot keys b. context-sensitive c. command syntax check
The MAC protocol can be very simple.
A. addressing b. error detection c. frame delimiting
It reduces unnecessary broadcasts.

3. What do you need to use for an initial configuration on a Cisco router?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. larger address space b. data types and classes of service c. authentication and encryption
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
Console interface

4. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Originate data flow.
Rollover cable
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

5. What is the purpose of a default gateway?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. addressing b. error detection c. frame delimiting
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
Identify the device that allows local network computers to communicate w/ devices in other networks.

6. 2 characteristics of clients in data networks
Logical Link Control sublayer
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. they initiate data exchanges b. they may upload data to servers
A. application b. presentation c. session d. transmision e. network f. data link g. physical

7. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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)
SMB

8. When a network service fails - which port is most often used to access a router for management purposes?
A random delay helps prevent the stations from experiencing another collision during transmission.
Console
The packets will be delivered and reassembled at destination.
It reduces unnecessary broadcasts.

9. What device can check for faults - integrity and performance of media?
Rollover cable
Identify the device that allows local network computers to communicate w/ devices in other networks.
OTDR
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

10. What command is used to change the default name to 'Costas'?
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
Router(config)# hostname Costas
Twisting of the cables
A. copper UTP b. optical fiber

11. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
A. next-hop b. metric/interface c. destination network address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. application b. presentation c. session d. transmision e. network f. data link g. physical

12. 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?
8
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. copper UTP b. optical fiber
255.255.255.224

13. How many bits make up an IPv4 address?
32 bits
Router
A default gateway (router).
Network Layer

14. 3 characteristics of valid Ethernet Layer 2 addresses
255.255.255.224
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

15. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Is used by the server to resolve names.
Source and Destination Ports

16. What is the primary reason for developing IPv6?
A. minimizing of collisions b. division into broadcast domains
A. it has centralized administration b. security is easier to enforce
It has expanded adressing capabilities.
Show Interfaces

17. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. replace a switch w/ a router b. subnet the new networks
A. enable mode b. priviledge executive mode
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
Destination Network Address

18. What do end devices do?
Originate data flow.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Source and Destination IP address
A. goodput b. throughput c. bandwidth

19. What can get you to an outside network?
A default gateway (router).
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
0 to 1023
Source and Destination Ports

20. What are 2 email components used to forward mail between servers?
A. replace a switch w/ a router b. subnet the new networks
Binary ANDing
A. MTA b. SMTP
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

21. 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?
A. purpose b. geographic location c. ownership
Create signals that represent the bits in each frame for the media.
172.16.192.160
A. non-deterministic b. less overhead c. collisions exist

22. Default Gateway is incorrect on the host - What is the impact on the communications?
UDP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. goodput b. throughput c. bandwidth
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

23. What is dinamically selected by the source host when forwarding data?
32 bits
Originate data flow.
A. minimizing of collisions b. division into broadcast domains
Source Port

24. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. low overhead b. connectionless
It uses support from the lower layers to distinguish between connections to the service.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

25. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
A. copper UTP b. optical fiber
172.16.192.160
Host mobility

26. Which type of cable is most often associated w/ fiber-optic cable?
A. flow control b. session establishment c. numbering and sequencing
Host mobility
A backbone cable.
Network Layer Packet

27. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
It uses lasers as the light source.
SMB
A. copper UTP b. optical fiber
255.255.255.0

28. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Originate data flow.
A. Physical b. Data Link
0 to 1023
To enable a receiving host to forward the data to the appropriate application.

29. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
Source Port
Network Layer
A. flow control b. session establishment c. numbering and sequencing

30. What determines the method of media access control?
A. it has centralized administration b. security is easier to enforce
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. media sharing b. logical topology
A. the router will discard the packet b. the router will send a time exceeded message to the source host

31. 3 terms that define the forms of help available within the Cisco IOS
Twisting of the cables
A. hot keys b. context-sensitive c. command syntax check
It uses lasers as the light source.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

32. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. media sharing b. logical topology
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. low overhead b. connectionless

33. What is a protocol that provides connectionless network layer services?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Source and Destination IP address
IP Protocol
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

34. An admin needs to keep contents private - which access method should he use?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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. 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
SSH

35. What is a default gateway address?

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36. 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?
The packets will be delivered and reassembled at destination.
Host A
2046
A. enable mode b. priviledge executive mode

37. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. next-hop b. metric/interface c. destination network address
Ctrl + Shift + 6
A. show startup-config b. show running-config
A. enable mode b. priviledge executive mode

38. Which IP packet field will prevent endless loops?
OTDR
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Show Interfaces
Time-to-live (TTL)

39. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
No collisions will occur on this link.
A. router b. firewall
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Fiber

40. What layer encapsulates segments into packets?
Network Layer
The address of the router that the host will use to 'get to the other side'.
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
Minimal delays in data delivery.

41. When a device is moved from one network to the other...?
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
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Collisions can decrease network performance.

42. 2 features that make switches preferable to hubs
SSH
A. minimizing of collisions b. division into broadcast domains
Router
Network Layer Packet

43. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A. enable mode b. priviledge executive mode
A backbone cable.
SMB

44. 3 features of IPv6
Collisions can decrease network performance.
A. goodput b. throughput c. bandwidth
A. larger address space b. data types and classes of service c. authentication and encryption
A physical topology.

45. What is the primary purpose of ARP?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Window Size
Destination is not contacted before a packet is sent.
Resolve IPv4 addresses to MAC addresses.

46. What are 3 properties of contention-based media access for a shared media?
TCP initializes the sequence numbers for the sessions.
Application Layer
A. non-deterministic b. less overhead c. collisions exist
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

47. What is the function of the DLL?
TCP initializes the sequence numbers for the sessions.
A. perform degradation b. security issues c. host identification
A. addressing b. error detection c. frame delimiting
It provides for the exchange of data over a common local media.

48. 2 characteristics of peer-2-peer
Network portion
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. decentralized resources b. resource sharing w/o a dedicated server
Rollover cable

49. What makes fiber preferable to copper for interconnecting buildings?
255.255.255.0
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
To enable a receiving host to forward the data to the appropriate application.

50. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
IP Protocol
Resolve IPv4 addresses to MAC addresses.
Network address

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CCNA - 2

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