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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. When destination network is not in the routing table - What are 2 actions the router might take?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Identify the device that allows local network computers to communicate w/ devices in other networks.

2. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. HTTP b. HTTPS
Any device whose backoff timer expires first.

3. 3 protocols that operate in the application layer
A. low overhead b. connectionless
A. DNS b. SMTP c. POP
The address of the router that the host will use to 'get to the other side'.
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

4. What device can check for faults - integrity and performance of media?
MAC
When connecting a host to a switch.
OTDR
It provides for the exchange of data over a common local media.

5. What is a benefit of a WAN?
A. servers b. routers c. network printers
Physical
0 to 1023
Host mobility

6. What are 2 common characteristics associated w/ dynamic routing protocols?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
0 to 1023

7. 3 functions of the upper data link sublayer in the OSI model
A default gateway (router).
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. HTTP b. HTTPS
SSH

8. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Console
Fiber
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Window Size

9. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
To facilitate the entry and exit of data on media.
Physical
Host mobility
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

10. What command is used to change the default name to 'Costas'?
Source and Destination Ports
A. minimizing of collisions b. division into broadcast domains
The physical address is added.
Router(config)# hostname Costas

11. What statements describe the logical token-passing topology?
Destination Network Address
Rollover cable
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Fiber

12. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. netstat -r b. route PRINT
Host mobility
A. larger address space b. data types and classes of service c. authentication and encryption

13. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Identify processes or services that are communicating with end devices.
Network Layer
A. replace a switch w/ a router b. subnet the new networks

14. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
UTP
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
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

15. What correctly describes a MAC address?
A. physical layer b. DLL layer
It uses lasers as the light source.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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

16. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
Transport
A physical topology.
172.16.192.160

17. What is the role of the OSI Application 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
It provides interface between applications on either end of the network.
A. decentralized resources b. resource sharing w/o a dedicated server
The physical address is added.

18. 2 characteristics of peer-2-peer
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. decentralized resources b. resource sharing w/o a dedicated server
To prevent the receiver from being overwhelmed by incoming data.
The magnetic field around the adjacent pairs of wire.

19. What method of signal transmission uses radio waves to carry signals?
2046
Signal loss can be experienced.
Wireless
Create signals that represent the bits in each frame for the media.

20. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
Router(config)# hostname Costas
A. copper UTP b. optical fiber
Switch

21. If you have a full-duplex operational network - what can happen?
The destination host address.
As the commands are entered.
No collisions will occur on this link.
A backbone cable.

22. What can get you to an outside network?
A default gateway (router).
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
A. performance degradation b. security issues c. host identification

23. 3 facts about the network portion of an IPv4 address
8
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Switch
Flash

24. In business LANs - which connector is used w/ twisted-pair networking cable?
Network Layer
RJ-45
Host A
It reduces unnecessary broadcasts.

25. 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?
Destination is not contacted before a packet is sent.
8
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
UDP

26. What event occurs during the 3-way handshake?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Wireless
TCP initializes the sequence numbers for the sessions.
A. copper UTP b. optical fiber

27. What info is found in the TCP and UDP header info?
Destination Network Address
Transport
Source and Destination Ports
A. low overhead b. connectionless

28. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
A. copper UTP b. optical fiber
Hub
Network Access

29. Default Gateway is incorrect on the host - What is the impact on the communications?
A. it has centralized administration b. security is easier to enforce
A. performance degradation b. security issues c. host identification
Fiber
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

30. Group of hosts that have identical bit patterns in the high order bits of their addresses
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network
Application Layer
UTP

31. What type of network cable is used between a terminal and a console port?
DNS
Rollover cable
172.16.192.160
A. MTA b. SMTP

32. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
IP is not properly installed
A. copper UTP b. optical fiber
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A random delay helps prevent the stations from experiencing another collision during transmission.

33. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
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)
Binary ANDing
A. enable mode b. priviledge executive mode

34. What are 2 forms of application layer software?
Router
A. DNS b. SMTP c. POP
A. application b. services
A. the router will discard the packet b. the router will send a time exceeded message to the source host

35. What application layer protocol is used to support file transfers between client and server?
A. netstat -r b. route PRINT
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The destination host address.
FTP

36. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. Physical b. Data Link
The MAC protocol can be very simple.
Physical

37. At which layers of the OSI model does ethernet operate?
Show Interfaces
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. physical layer b. DLL layer
32 bits

38. What do you need to use for an initial configuration on a Cisco router?
Logical Link Control sublayer
Console interface
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. flow control b. session establishment c. numbering and sequencing

39. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. physical layer b. DLL layer
UDP
A. next-hop b. metric/interface c. destination network address

40. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
A. flow control b. session establishment c. numbering and sequencing
A. performance degradation b. security issues c. host identification
A. DB 60 b. Winchester 15-pin c. smart serial

41. 3 properties of peer-2-peer applications
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It reduces unnecessary broadcasts.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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

42. In a connectionless system - What is correct?
Rollover cable
Destination is not contacted before a packet is sent.
Resolve IPv4 addresses to MAC addresses.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

43. What is the purpose of a default gateway?
A backbone cable.
Identify the device that allows local network computers to communicate w/ devices in other networks.
It provides for the exchange of data over a common local media.
A. physical layer b. DLL layer

44. During a TCP session - if packets arrive out of order - what will happen?
172.16.192.160
Identify processes or services that are communicating with end devices.
The packets will be delivered and reassembled at destination.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

45. Where is the IOS file stored at?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Flash
2046

46. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Static
Create signals that represent the bits in each frame for the media.
Network address
Transport

47. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Supports error detection.
255.255.255.0
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

48. 3 features of IPv6
A. next-hop b. metric/interface c. destination network address
A. larger address space b. data types and classes of service c. authentication and encryption
A. purpose b. geographic location c. ownership
They must wait until the first hosts finish transfering the media.

49. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. replace a switch w/ a router b. subnet the new networks
The packets will be delivered and reassembled at destination.
UDP

50. What can you identify when you examine the Network Layer header?
The destination host address.
The magnetic field around the adjacent pairs of wire.
The address of the router that the host will use to 'get to the other side'.
A backbone cable.