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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. Which type of cable is most often associated w/ fiber-optic cable?
A. application b. services
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A backbone cable.
A. physical layer b. DLL layer

2. 2 functions of encapsulation
Source and Destination Ports
The MAC protocol can be very simple.
It uses lasers as the light source.
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 are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. perform degradation b. security issues c. host identification
The magnetic field around the adjacent pairs of wire.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

4. Why are port numbers included in the TCP header of a segment?
255.255.255.0
To enable a receiving host to forward the data to the appropriate application.
Physical
No collisions will occur on this link.

5. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
Next-Hop Address
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Source Port

6. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Network
Fiber
It has expanded adressing capabilities.
A. servers b. routers c. network printers

7. To make a console connection from a comp to a Cisco router - what cable should be used?
Next-Hop Address
It reduces unnecessary broadcasts.
A. it has centralized administration b. security is easier to enforce
Rollover cable

8. What is the role of the OSI Application Layer?
The destination host address.
It provides interface between applications on either end of the network.
IP Protocol
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

9. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
Fiber
A. goodput b. throughput c. bandwidth
Signal loss can be experienced.

10. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
A. router b. firewall
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. the router will discard the packet b. the router will send a time exceeded message to the source host

11. After an ethernet collision - which device has priority to transmit data?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Any device whose backoff timer expires first.
A. they initiate data exchanges b. they may upload data to servers
Rollover cable

12. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It does not support encryption.
A. goodput b. throughput c. bandwidth
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Supports error detection.

13. What application layer protocol is used to support file transfers between client and server?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. copper UTP b. optical fiber
FTP
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

14. Which device is used to create or divide broadcast domains?
A. next-hop b. metric/interface c. destination network address
Router
A. goodput b. throughput c. bandwidth
Identify processes or services that are communicating with end devices.

15. Where is the IOS file stored at?
Resolve IPv4 addresses to MAC addresses.
OTDR
Flash
No collisions will occur on this link.

16. 3 statements about the role of routers in the network
A. router b. firewall
A. purpose b. geographic location c. ownership
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. perform degradation b. security issues c. host identification

17. What is an effect of improperly applying a network cable connector?
Physical
Signal loss can be experienced.
A. MTA b. SMTP
TCP initializes the sequence numbers for the sessions.

18. What info is found in the TCP and UDP header info?
It provides for the exchange of data over a common local media.
2046
Source and Destination Ports
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

19. Why is flow control used for TCP data transfer?
Network Media Control
UDP
Console
To prevent the receiver from being overwhelmed by incoming data.

20. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Time-to-live (TTL)
Network Layer Packet
A. MTA b. SMTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

21. An admin needs to keep contents private - which access method should he use?
Is a layer of specific encapsulation.
Logical Link Control sublayer
A. decentralized resources b. resource sharing w/o a dedicated server
SSH

22. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
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. not affected by EMI of RFI b. most expensive type of LAN cabling
It provides interface between applications on either end of the network.

23. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Router(config)# hostname Costas
A. hot keys b. context-sensitive c. command syntax check
Show Interfaces
255.255.255.0

24. Which portion of the network layer address does a router use to forward packets?
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
Network portion
Binary ANDing
Destination is not contacted before a packet is sent.

25. What characteristic of an UTP helps reduce interference?
A backbone cable.
Twisting of the cables
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
0 to 1023

26. What is a characteristic of a logical point-to-point topology?
A. purpose b. geographic location c. ownership
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The MAC protocol can be very simple.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

27. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. Physical b. Data Link
A random delay helps prevent the stations from experiencing another collision during transmission.
A. it has centralized administration b. security is easier to enforce
A. physical layer b. DLL layer

28. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
To enable a receiving host to forward the data to the appropriate application.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Hosts return to listen-before-transmit mode.

29. What do you need to use for an initial configuration on a Cisco router?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Router(config)# hostname Costas
Network Layer
Console interface

30. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
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. 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
IP is not properly installed
Minimal delays in data delivery.

31. 3 protocols that operate in the application layer
A. next-hop b. metric/interface c. destination network address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. DNS b. SMTP c. POP
Console

32. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. HTTP b. HTTPS
A. Physical b. Data Link
Logical Link Control sublayer

33. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. larger address space b. data types and classes of service c. authentication and encryption
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Application Layer

34. What determines the method of media access control?
Minimal delays in data delivery.
A. media sharing b. logical topology
Network Access
A default gateway (router).

35. 3 characteristics of valid Ethernet Layer 2 addresses
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Any device whose backoff timer expires first.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A random delay helps prevent the stations from experiencing another collision during transmission.

36. 2 characteristics of clients in data networks
Rollover cable
A. they initiate data exchanges b. they may upload data to servers
8
Minimal delays in data delivery.

37. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. perform degradation b. security issues c. host identification
Physical
A. DB 60 b. Winchester 15-pin c. smart serial
Is used by the server to resolve names.

38. Which layer supplies services and allows user interface?
Application Layer
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To prevent the receiver from being overwhelmed by incoming data.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

39. Network Protocols
It uses support from the lower layers to distinguish between connections to the service.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
SMB

40. 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?
Minimal delays in data delivery.
To enable a receiving host to forward the data to the appropriate application.
They must wait until the first hosts finish transfering the media.
Is a layer of specific encapsulation.

41. What is a component of a routing table entry?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Next-Hop Address
As the commands are entered.
The MAC protocol can be very simple.

42. What is the proper order of the OSI Layers?
2046
A. copper UTP b. optical fiber
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. minimizing of collisions b. division into broadcast domains

43. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
8
Hosts return to listen-before-transmit mode.
A backbone cable.
To prevent the receiver from being overwhelmed by incoming data.

44. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
Host A
Minimal delays in data delivery.
It reduces unnecessary broadcasts.

45. In a connectionless system - What is correct?
Any device whose backoff timer expires first.
The MAC protocol can be very simple.
A. flow control b. session establishment c. numbering and sequencing
Destination is not contacted before a packet is sent.

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. servers b. routers c. network printers
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. Cat5 UTP b. Cat6 UTP

47. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. next-hop b. metric/interface c. destination network address
8
A. Cat5 UTP b. Cat6 UTP

48. At which layer of the TCP/IP model does ethernet operate?
Rollover cable
IP Protocol
Network Access
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

49. When a network service fails - which port is most often used to access a router for management purposes?
32 bits
Is a layer of specific encapsulation.
Console
Originate data flow.

50. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
A. DB 60 b. Winchester 15-pin c. smart serial
Destination Network Address
Hosts return to listen-before-transmit mode.