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CCNA - 2

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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 there is a graphic representation of a company network wiring and equipment - What is this called?
8
A physical topology.
The MAC protocol can be very simple.
Rollover cable

2. 3 statements of media acess control
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The address of the router that the host will use to 'get to the other side'.
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
No collisions will occur on this link.

3. What characteristic of an UTP helps reduce interference?
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
Twisting of the cables
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. router b. firewall

4. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. hot keys b. context-sensitive c. command syntax check
Window Size
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UDP

5. 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.
Router(config)# hostname Costas
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

6. What do end devices do?
DNS
Originate data flow.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

7. When destination network is not in the routing table - What are 2 actions the router might take?
Any device whose backoff timer expires first.
172.16.192.160
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

8. 3 properties of peer-2-peer applications
Wireless
The destination host address.
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

9. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
2046
A. router b. firewall
Console interface

10. What can be a problem that is reduced by adding end-to-end addressing?
Logical Link Control sublayer
It reduces unnecessary broadcasts.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. not affected by EMI of RFI b. most expensive type of LAN cabling

11. 3 features of IPv6
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It reduces unnecessary broadcasts.
Switch
A. larger address space b. data types and classes of service c. authentication and encryption

12. 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?
Host A
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The physical address is added.
No collisions will occur on this link.

13. What command can be used to determine if the router has experienced any input or output errors?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Show Interfaces
To enable a receiving host to forward the data to the appropriate application.
Network Layer Packet

14. 3 statements about routes and their use
Window Size
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
OTDR

15. What is an automated service that matches resource names w/ required IP addresses?
DNS
IP Protocol
Twisting of the cables
A. they initiate data exchanges b. they may upload data to servers

16. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
MAC
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

17. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. it has centralized administration b. security is easier to enforce
Rollover cable
A. larger address space b. data types and classes of service c. authentication and encryption

18. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. minimizing of collisions b. division into broadcast domains
IP is not properly installed
A. Physical b. Data Link

19. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
Identify processes or services that are communicating with end devices.
A. media sharing b. logical topology
A. non-deterministic b. less overhead c. collisions exist

20. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
A. goodput b. throughput c. bandwidth
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Console interface

21. 2 characteristics of peer-2-peer
Window Size
Is used by the server to resolve names.
A. decentralized resources b. resource sharing w/o a dedicated server
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

22. 2 features that make switches preferable to hubs
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. minimizing of collisions b. division into broadcast domains
OTDR
Router(config)# interface FastEthernet 0/1

23. 3 features that allow TCP to realibly and accurately track the transmission of data
Ctrl + Shift + 6
A. non-deterministic b. less overhead c. collisions exist
A. flow control b. session establishment c. numbering and sequencing
Router

24. When a network service fails - which port is most often used to access a router for management purposes?
A. show startup-config b. show running-config
UDP
A. HTTP b. HTTPS
Console

25. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A backbone cable.
A. DB 60 b. Winchester 15-pin c. smart serial
A. physical layer b. DLL layer
A. MTA b. SMTP

26. Intermediary devices used to implement security between networks
The address of the router that the host will use to 'get to the other side'.
A. router b. firewall
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
Application Layer

27. Which IP packet field will prevent endless loops?
Twisting of the cables
Time-to-live (TTL)
A physical topology.
Source and Destination IP address

28. What can you identify when you examine the Network Layer header?
Router(config)# interface FastEthernet 0/1
8
The destination host address.
It provides for the exchange of data over a common local media.

29. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Hosts return to listen-before-transmit mode.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

30. When do changes take effect in a Cisco router?
Create signals that represent the bits in each frame for the media.
As the commands are entered.
The packets will be delivered and reassembled at destination.
A. performance degradation b. security issues c. host identification

31. Statements that describe LAN
Rollover cable
Twisting of the cables
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. low overhead b. connectionless

32. Important characteristic of UDP
The physical address is added.
A. larger address space b. data types and classes of service c. authentication and encryption
Minimal delays in data delivery.
A. purpose b. geographic location c. ownership

33. What method of signal transmission uses radio waves to carry signals?
Wireless
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

34. Why is flow control used for TCP data transfer?
OTDR
To prevent the receiver from being overwhelmed by incoming data.
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
Source and Destination Ports

35. What do the intermediary devices in the network do?
A. router b. firewall
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The magnetic field around the adjacent pairs of wire.

36. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Window Size
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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. Cat5 UTP b. Cat6 UTP

37. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It reduces unnecessary broadcasts.
255.255.255.0
0 to 1023

38. What can get you to an outside network?
Fiber
Twisting of the cables
A default gateway (router).
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

39. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
MAC
Identify processes or services that are communicating with end devices.
Host mobility
Binary ANDing

40. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
Hosts return to listen-before-transmit mode.
The MAC protocol can be very simple.
Flash

41. If you have a full-duplex operational network - what can happen?
The address of the router that the host will use to 'get to the other side'.
SSH
A. servers b. routers c. network printers
No collisions will occur on this link.

42. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Is a layer of specific encapsulation.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. they initiate data exchanges b. they may upload data to servers

43. Which layer supplies services and allows user interface?
Destination Network Address
255.255.255.0
Rollover cable
Application Layer

44. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
To prevent the receiver from being overwhelmed by incoming data.
A. enable mode b. priviledge executive mode
Network Layer Packet
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

45. What are 3 pieces of info about a route contained in a routing table?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
FTP
A. next-hop b. metric/interface c. destination network address

46. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
A. DB 60 b. Winchester 15-pin c. smart serial
A. larger address space b. data types and classes of service c. authentication and encryption
Router(config)# hostname Costas

47. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It provides for the exchange of data over a common local media.
Collisions can decrease network performance.

48. What is the purpose of a default gateway?
Source Port
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. perform degradation b. security issues c. host identification
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

49. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
32 bits
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Source and Destination Ports
A random delay helps prevent the stations from experiencing another collision during transmission.

50. What info is found in the TCP and UDP header info?
Source and Destination Ports
Network Layer Packet
A. perform degradation b. security issues c. host identification
A. Physical b. Data Link

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CCNA - 2

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