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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.
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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 method of signal transmission uses radio waves to carry signals?
FTP
When connecting a host to a switch.
Wireless
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

2. What are 3 properties of contention-based media access for a shared media?
Is used by the server to resolve names.
MAC
A. non-deterministic b. less overhead c. collisions exist
Network Access

3. What are 2 commands used to view a host routing table?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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. netstat -r b. route PRINT
Wireless

4. What are 2 email components used to forward mail between servers?
Create signals that represent the bits in each frame for the media.
A. Physical b. Data Link
A. goodput b. throughput c. bandwidth
A. MTA b. SMTP

5. What application layer protocol is used to support file transfers between client and server?
Create signals that represent the bits in each frame for the media.
FTP
TCP initializes the sequence numbers for the sessions.
A. Cat5 UTP b. Cat6 UTP

6. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
To prevent the receiver from being overwhelmed by incoming data.
A. it has centralized administration b. security is easier to enforce
It uses support from the lower layers to distinguish between connections to the service.

7. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. physical layer b. DLL layer
Destination is not contacted before a packet is sent.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Application Layer

8. When a device is moved from one network to the other...?
FTP
Create signals that represent the bits in each frame for the media.
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. not affected by EMI of RFI b. most expensive type of LAN cabling

9. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
Flash
A. next-hop b. metric/interface c. destination network address
To prevent the receiver from being overwhelmed by incoming data.

10. When a network service fails - which port is most often used to access a router for management purposes?
Console
Router
UDP
255.255.255.224

11. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Source and Destination IP address
The MAC protocol can be very simple.
A. Physical b. Data Link

12. What is the proper order of the OSI Layers?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. hot keys b. context-sensitive c. command syntax check
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. application b. presentation c. session d. transmision e. network f. data link g. physical

13. 3 facts about the network portion of an IPv4 address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
0 to 1023
Host mobility

14. What are 2 features of User Diagram Protocol (UDP)?
A. copper UTP b. optical fiber
255.255.255.0
A. low overhead b. connectionless
A. flow control b. session establishment c. numbering and sequencing

15. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Binary ANDing
Hub
A. goodput b. throughput c. bandwidth
A. replace a switch w/ a router b. subnet the new networks

16. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. Physical b. Data Link
Network portion
A. media sharing b. logical topology

17. What is the purpose of the TCP/IP Network Application Layer?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
255.255.255.224
Show Interfaces
Network Media Control

18. At which layer of the TCP/IP model does ethernet operate?
To prevent the receiver from being overwhelmed by incoming data.
Hosts return to listen-before-transmit mode.
Network Access
Network

19. What can get you to an outside network?
A. copper UTP b. optical fiber
A default gateway (router).
The MAC protocol can be very simple.
Create signals that represent the bits in each frame for the media.

20. Which characteristics describe fiber optic cable?
Console
When connecting a host to a switch.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

21. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
The destination host address.
OTDR
It does not support encryption.

22. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. they initiate data exchanges b. they may upload data to servers
Identify processes or services that are communicating with end devices.
The address of the router that the host will use to 'get to the other side'.

23. 3 factors that should be considered when implementing Layer 2 protocols
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Twisting of the cables
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It reduces unnecessary broadcasts.

24. What is PDU?
A. replace a switch w/ a router b. subnet the new networks
Host mobility
Is a layer of specific encapsulation.
0 to 1023

25. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. goodput b. throughput c. bandwidth
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network
A. the router will discard the packet b. the router will send a time exceeded message to the source host

26. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Twisting of the cables
A. DB 60 b. Winchester 15-pin c. smart serial
Console
Physical

27. 3 properties of peer-2-peer applications
As the commands are entered.
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
UTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

28. What is the primary reason for developing IPv6?
Router(config)# interface FastEthernet 0/1
It has expanded adressing capabilities.
A. they initiate data exchanges b. they may upload data to servers
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

29. 2 characteristics of peer-2-peer
A. replace a switch w/ a router b. subnet the new networks
A. decentralized resources b. resource sharing w/o a dedicated server
A. larger address space b. data types and classes of service c. authentication and encryption
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. What can be a problem that is reduced by adding end-to-end addressing?
A. non-deterministic b. less overhead c. collisions exist
The packets will be delivered and reassembled at destination.
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
It reduces unnecessary broadcasts.

31. What command is used to change the default name to 'Costas'?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The destination host address.
Router(config)# hostname Costas
A. application b. services

32. Which type of cable is most often associated w/ fiber-optic cable?
A. DNS b. SMTP c. POP
It reduces unnecessary broadcasts.
A backbone cable.
A. enable mode b. priviledge executive mode

33. Important characteristic of UDP
IP Protocol
Minimal delays in data delivery.
OTDR
Switch

34. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
2046
Hub
UDP
Twisting of the cables

35. Default Gateway is incorrect on the host - What is the impact on the communications?
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Hosts return to listen-before-transmit mode.
Transport

36. 3 features that allow TCP to realibly and accurately track the transmission of data
A. physical layer b. DLL layer
No collisions will occur on this link.
A. low overhead b. connectionless
A. flow control b. session establishment c. numbering and sequencing

37. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
IP is not properly installed
0 to 1023
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

38. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
To facilitate the entry and exit of data on media.
A random delay helps prevent the stations from experiencing another collision during transmission.
Resolve IPv4 addresses to MAC addresses.

39. What is an effect of improperly applying a network cable connector?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A physical topology.
It provides interface between applications on either end of the network.
Signal loss can be experienced.

40. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
255.255.255.224
Supports error detection.
Transport
Time-to-live (TTL)

41. 3 protocols that operate in the application layer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. DNS b. SMTP c. POP
A. Physical b. Data Link
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

42. What type of network cable is used between a terminal and a console port?
Rollover cable
Hub
A. DB 60 b. Winchester 15-pin c. smart serial
A. router b. firewall

43. Statements that describe LAN
Switch
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. DNS b. SMTP c. POP
A. router b. firewall

44. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It reduces unnecessary broadcasts.
Network address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

45. What is dinamically selected by the source host when forwarding data?
Source Port
The MAC protocol can be very simple.
It provides for the exchange of data over a common local media.
A. Physical b. Data Link

46. 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.
Rollover cable
A. router b. firewall
A default gateway (router).

47. Network Protocols
Supports error detection.
Network Media Control
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host mobility

48. What command can be used to determine if the router has experienced any input or output errors?
255.255.255.0
Binary ANDing
Show Interfaces
Fiber

49. 2 characteristics of clients in data networks
Time-to-live (TTL)
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. they initiate data exchanges b. they may upload data to servers
172.16.192.160

50. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. low overhead b. connectionless
It provides interface between applications on either end of the network.
Destination Network Address
Switch

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CCNA - 2

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