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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. 3 properties of peer-2-peer applications
Network portion
A. goodput b. throughput c. bandwidth
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 physical topology.

2. What are the advantages of using a client-server model?
Destination Network Address
A. servers b. routers c. network printers
A. application b. services
A. it has centralized administration b. security is easier to enforce

3. What is the role of MTA in handling email?
A. purpose b. geographic location c. ownership
Any device whose backoff timer expires first.
A. they initiate data exchanges b. they may upload data to servers
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

4. What is a protocol that provides connectionless network layer services?
Identify processes or services that are communicating with end devices.
Router(config)# hostname Costas
A. addressing b. error detection c. frame delimiting
IP Protocol

5. When do changes take effect in a Cisco router?
32 bits
Wireless
As the commands are entered.
A. MTA b. SMTP

6. What characteristic of an UTP helps reduce interference?
A. perform degradation b. security issues c. host identification
Console
Twisting of the cables
Is a layer of specific encapsulation.

7. What is a characteristic of a logical point-to-point topology?
A. replace a switch w/ a router b. subnet the new networks
255.255.255.224
It does not support encryption.
The MAC protocol can be very simple.

8. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Host A
A. application b. services
A. performance degradation b. security issues c. host identification

9. When a network service fails - which port is most often used to access a router for management purposes?
A. decentralized resources b. resource sharing w/o a dedicated server
A. low overhead b. connectionless
Console
Resolve IPv4 addresses to MAC addresses.

10. What are 2 common characteristics associated w/ dynamic routing protocols?
TCP initializes the sequence numbers for the sessions.
Create signals that represent the bits in each frame for the media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Flash

11. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Flash
Minimal delays in data delivery.
Resolve IPv4 addresses to MAC addresses.
A random delay helps prevent the stations from experiencing another collision during transmission.

12. What are 2 email components used to forward mail between servers?
A. media sharing b. logical topology
The address of the router that the host will use to 'get to the other side'.
A. larger address space b. data types and classes of service c. authentication and encryption
A. MTA b. SMTP

13. What describes the purpose of default route?
They must wait until the first hosts finish transfering the media.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Router(config)# interface FastEthernet 0/1

14. 2 functions of encapsulation
Network
Router(config)# hostname Costas
Host A
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

15. 2 features that make switches preferable to hubs
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
DNS
A. minimizing of collisions b. division into broadcast domains
Is a layer of specific encapsulation.

16. 3 functions of the upper data link sublayer in the OSI model
IP Protocol
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
172.16.192.160
Flash

17. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
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
It does not support encryption.
As the commands are entered.

18. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Console
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

19. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Network address
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
Time-to-live (TTL)

20. What layer encapsulates segments into packets?
Router(config)# interface FastEthernet 0/1
Network Layer
Static
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

21. 3 measures of data transfer
Application Layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. goodput b. throughput c. bandwidth
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

22. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Static
Rollover cable
Identify processes or services that are communicating with end devices.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

23. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
80 (HTTP)
A. Physical b. Data Link
Any device whose backoff timer expires first.

24. What is an effect of improperly applying a network cable connector?
The MAC protocol can be very simple.
Signal loss can be experienced.
Fiber
UDP

25. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Network Layer Packet
A. addressing b. error detection c. frame delimiting
MAC
As the commands are entered.

26. What are 2 features of User Diagram Protocol (UDP)?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Layer
A. it has centralized administration b. security is easier to enforce
A. low overhead b. connectionless

27. 2 most commonly used media types in ethernet networks
Collisions can decrease network performance.
A. copper UTP b. optical fiber
A. low overhead b. connectionless
Router(config)# hostname Costas

28. What info is found in the TCP and UDP header info?
Source and Destination Ports
UTP
RJ-45
A. performance degradation b. security issues c. host identification

29. What is the role of the OSI Application Layer?
Network Access
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It provides interface between applications on either end of the network.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

30. 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. they initiate data exchanges b. they may upload data to servers
Network portion
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. perform degradation b. security issues c. host identification

31. What is a benefit of a WAN?
A. goodput b. throughput c. bandwidth
Host mobility
RJ-45
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

32. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Flash
Rollover cable
A. addressing b. error detection c. frame delimiting
Fiber

33. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
255.255.255.224
Signal loss can be experienced.
To facilitate the entry and exit of data on media.

34. What do the intermediary devices in the network do?
TCP initializes the sequence numbers for the sessions.
Show Interfaces
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Identify processes or services that are communicating with end devices.

35. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. router b. firewall
Physical
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
2046

36. An admin needs to keep contents private - which access method should he use?
Is used by the server to resolve names.
Router
SSH
Wireless

37. What is a component of a routing table entry?
It does not support encryption.
It provides interface between applications on either end of the network.
Next-Hop Address
Create signals that represent the bits in each frame for the media.

38. Why is flow control used for TCP data transfer?
It uses lasers as the light source.
To prevent the receiver from being overwhelmed by incoming data.
RJ-45
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

39. What kind of problems are caused by excessive broadcast traffic on network segments?
Time-to-live (TTL)
TCP initializes the sequence numbers for the sessions.
UDP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

40. What is a default gateway address?

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41. 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
RJ-45
A random delay helps prevent the stations from experiencing another collision during transmission.
A. router b. firewall

42. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Binary ANDing
Ctrl + Shift + 6
Rollover cable

43. Intermediary devices used to implement security between networks
IP is not properly installed
A. application b. services
8
A. router b. firewall

44. What determines the method of media access control?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. physical layer b. DLL layer
A. media sharing b. logical topology
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

45. What statements describe the logical token-passing topology?
Is a layer of specific encapsulation.
A. Cat5 UTP b. Cat6 UTP
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Switch

46. What is the proper order of the OSI Layers?
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. DB 60 b. Winchester 15-pin c. smart serial
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The magnetic field around the adjacent pairs of wire.

47. What are key considering factors when grouping hosts into common networks?
8
A. purpose b. geographic location c. ownership
It uses lasers as the light source.
A. application b. services

48. When is a straight-through cable used in a network?
A physical topology.
When connecting a host to a switch.
A. replace a switch w/ a router b. subnet the new networks
Hosts return to listen-before-transmit mode.

49. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Fiber
Hosts return to listen-before-transmit mode.
RJ-45
32 bits

50. 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. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Static
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

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CCNA - 2

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