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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. What is the purpose of the TCP/IP Network Application Layer?
Network address
Network Media Control
A random delay helps prevent the stations from experiencing another collision during transmission.
A. flow control b. session establishment c. numbering and sequencing

2. 2 functions of encapsulation
A. DB 60 b. Winchester 15-pin c. smart serial
Network Media Control
Console
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

3. What layer encapsulates segments into packets?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
IP is not properly installed
Network Layer Packet
Network Layer

4. Which device is used to create or divide broadcast domains?
A. application b. services
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
0 to 1023
Router

5. statements of IP adressing
Hosts return to listen-before-transmit mode.
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
As the commands are entered.
SMB

6. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. Cat5 UTP b. Cat6 UTP
Time-to-live (TTL)
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

7. What kind of problems are caused by excessive broadcast traffic on network segments?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
IP Protocol
As the commands are entered.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

8. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. servers b. routers c. network printers
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
As the commands are entered.

9. 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?
172.16.192.160
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
255.255.255.0
A. media sharing b. logical topology

10. 3 features of IPv6
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. larger address space b. data types and classes of service c. authentication and encryption
Is used by the server to resolve names.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

11. What is a component of a routing table entry?
Next-Hop Address
Network Media Control
The MAC protocol can be very simple.
A random delay helps prevent the stations from experiencing another collision during transmission.

12. There are too many broadcasts on switches - what can be done?
It does not support encryption.
IP Protocol
A. replace a switch w/ a router b. subnet the new networks
A. DNS b. SMTP c. POP

13. At which layers of the OSI model does ethernet operate?
The destination host address.
A. physical layer b. DLL layer
A. enable mode b. priviledge executive mode
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

14. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. MTA b. SMTP
A. enable mode b. priviledge executive mode
A. the router will discard the packet b. the router will send a time exceeded message to the source host

15. Important characteristic of UDP
Minimal delays in data delivery.
A. next-hop b. metric/interface c. destination network address
Identify the device that allows local network computers to communicate w/ devices in other networks.
Hub

16. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Static
Twisting of the cables
Host mobility

17. 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)
It provides for the exchange of data over a common local media.
A. low overhead b. connectionless
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

18. What is the role of MTA in handling email?
Hosts return to listen-before-transmit mode.
A. DNS b. SMTP c. POP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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. 2 characteristics of peer-2-peer
Minimal delays in data delivery.
It provides interface between applications on either end of the network.
A. decentralized resources b. resource sharing w/o a dedicated server
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

20. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
A random delay helps prevent the stations from experiencing another collision during transmission.
Router
Destination Network Address

21. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
It has expanded adressing capabilities.
Hosts return to listen-before-transmit mode.
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

22. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Host A
0 to 1023
Application Layer

23. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
Signal loss can be experienced.
Network
Router(config)# hostname Costas
They must wait until the first hosts finish transfering the media.

24. How does the application layer on a server process multiple client requests for services?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It uses support from the lower layers to distinguish between connections to the service.
255.255.255.0
A default gateway (router).

25. What method of signal transmission uses radio waves to carry signals?
The physical address is added.
Source and Destination Ports
It has expanded adressing capabilities.
Wireless

26. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
Network address
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

27. Which 2 options represent Layer 4 addressing?
8
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Source and Destination IP address

28. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
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. low overhead b. connectionless
Network Media Control

29. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
Flash
Switch
Rollover cable

30. During encapsulation - what happens in the Data Link Layer?
Network portion
The physical address is added.
Identify processes or services that are communicating with end devices.
A. physical layer b. DLL layer

31. What is a default gateway address?

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32. 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. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
80 (HTTP)
A. media sharing b. logical topology

33. An admin needs to keep contents private - which access method should he use?
Window Size
SSH
Transport
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

34. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
The physical address is added.
A default gateway (router).
A. DB 60 b. Winchester 15-pin c. smart serial

35. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
It has expanded adressing capabilities.
Static
Switch
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

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?
A. minimizing of collisions b. division into broadcast domains
Host A
Supports error detection.
Window Size

37. What causes crosstalk within cable pairs when using UTP?
Show Interfaces
The magnetic field around the adjacent pairs of wire.
It does not support encryption.
80 (HTTP)

38. What event occurs during the 3-way handshake?
Flash
To facilitate the entry and exit of data on media.
TCP initializes the sequence numbers for the sessions.
A. addressing b. error detection c. frame delimiting

39. When a network service fails - which port is most often used to access a router for management purposes?
Console
It provides for the exchange of data over a common local media.
Create signals that represent the bits in each frame for the media.
Console interface

40. 3 factors that should be considered when implementing Layer 2 protocols
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
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Any device whose backoff timer expires first.

41. At which layer of the TCP/IP model does ethernet operate?
Network Access
To enable a receiving host to forward the data to the appropriate application.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copper UTP b. optical fiber

42. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Minimal delays in data delivery.
To enable a receiving host to forward the data to the appropriate application.
0 to 1023
A. Cat5 UTP b. Cat6 UTP

43. Which layer supplies services and allows user interface?
Application Layer
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
80 (HTTP)
Flash

44. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. Physical b. Data Link
OTDR
Fiber
Rollover cable

45. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Source Port
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

46. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
A backbone cable.
Network Layer Packet
8

47. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Console
Transport

48. What can you identify when you examine the Network Layer header?
A. it has centralized administration b. security is easier to enforce
A. non-deterministic b. less overhead c. collisions exist
The destination host address.
A. perform degradation b. security issues c. host identification

49. What are 2 protocols for transfering web resources?
A. netstat -r b. route PRINT
A. HTTP b. HTTPS
A. hot keys b. context-sensitive c. command syntax check
TCP initializes the sequence numbers for the sessions.

50. What are 2 features of User Diagram Protocol (UDP)?
A. show startup-config b. show running-config
UTP
A physical topology.
A. low overhead b. connectionless