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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 a characteristic of a single-mode fiber-optic cable?
A. physical layer b. DLL layer
Physical
It uses lasers as the light source.
It provides for the exchange of data over a common local media.

2. What causes crosstalk within cable pairs when using UTP?
DNS
The magnetic field around the adjacent pairs of wire.
255.255.255.0
Logical Link Control sublayer

3. 3 factors that should be considered when implementing Layer 2 protocols
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
As the commands are entered.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
RJ-45

4. What is a protocol that provides connectionless network layer services?
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
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
The physical address is added.

5. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Host mobility
Network address
Router(config)# interface FastEthernet 0/1
It provides interface between applications on either end of the network.

6. There are too many broadcasts on switches - what can be done?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
To facilitate the entry and exit of data on media.
A. replace a switch w/ a router b. subnet the new networks
Host A

7. 2 characteristics of clients in data networks
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. they initiate data exchanges b. they may upload data to servers
Network Media Control

8. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Hub
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
Host A

9. What type of network cable is used between a terminal and a console port?
Rollover cable
It has expanded adressing capabilities.
A. media sharing b. logical topology
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

10. What is the purpose of the preamble in an ethernet frame?
A. MTA b. SMTP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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
UDP

11. What are 3 properties of contention-based media access for a shared media?
Minimal delays in data delivery.
Hub
A. non-deterministic b. less overhead c. collisions exist
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

12. 3 statements of media acess control
A. Physical b. Data Link
SMB
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
A. servers b. routers c. network printers

13. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
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
It uses lasers as the light source.
A. non-deterministic b. less overhead c. collisions exist

14. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. DB 60 b. Winchester 15-pin c. smart serial
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

15. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Network Media Control
A. performance degradation b. security issues c. host identification
A. Physical b. Data Link
A. larger address space b. data types and classes of service c. authentication and encryption

16. What describes the purpose of default route?
8
Switch
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Create signals that represent the bits in each frame for the media.

17. Statements that describe LAN
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. Physical b. Data Link
A backbone cable.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

18. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
IP is not properly installed
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. addressing b. error detection c. frame delimiting

19. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network Layer Packet
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
Source and Destination IP address

20. What are key considering factors when grouping hosts into common networks?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It does not support encryption.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. purpose b. geographic location c. ownership

21. 3 statements about the role of routers in the network
To enable a receiving host to forward the data to the appropriate application.
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Flash

22. During encapsulation - what happens in the Data Link Layer?
A. DB 60 b. Winchester 15-pin c. smart serial
The MAC protocol can be very simple.
Is a layer of specific encapsulation.
The physical address is added.

23. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
Source Port
IP is not properly installed
A. Physical b. Data Link

24. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. non-deterministic b. less overhead c. collisions exist
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 random delay helps prevent the stations from experiencing another collision during transmission.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

25. What is a component of a routing table entry?
A. purpose b. geographic location c. ownership
Next-Hop Address
Minimal delays in data delivery.
A. minimizing of collisions b. division into broadcast domains

26. What information is added during encapsulation at OSI Layer 3?
A. perform degradation b. security issues c. host identification
Source and Destination IP address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
They must wait until the first hosts finish transfering the media.

27. What is the primary rope of the physical layer in transmitting data?
A. DB 60 b. Winchester 15-pin c. smart serial
A. purpose b. geographic location c. ownership
Create signals that represent the bits in each frame for the media.
A. non-deterministic b. less overhead c. collisions exist

28. What are 2 features of User Diagram Protocol (UDP)?
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
Destination Network Address
A. low overhead b. connectionless
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

29. In a connectionless system - What is correct?
A. perform degradation b. security issues c. host identification
Network Media Control
A. performance degradation b. security issues c. host identification
Destination is not contacted before a packet is sent.

30. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
Switch
Signal loss can be experienced.
Network portion

31. Where is the IOS file stored at?
Flash
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. low overhead b. connectionless
Router(config)# interface FastEthernet 0/1

32. 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
TCP initializes the sequence numbers for the sessions.
A. it has centralized administration b. security is easier to enforce
Network Media Control

33. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
32 bits
Supports error detection.
Host A
SSH

34. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Next-Hop Address

35. Default Gateway is incorrect on the host - What is the impact on the communications?
Source and Destination Ports
A. larger address space b. data types and classes of service c. authentication and encryption
To facilitate the entry and exit of data on media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

36. What are 2 common characteristics associated w/ dynamic routing protocols?
A. physical layer b. DLL layer
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. performance degradation b. security issues c. host identification
Originate data flow.

37. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network Access
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network

38. Why is flow control used for TCP data transfer?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
TCP initializes the sequence numbers for the sessions.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To prevent the receiver from being overwhelmed by incoming data.

39. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. performance degradation b. security issues c. host identification
A. DNS b. SMTP c. POP
They must wait until the first hosts finish transfering the media.
SMB

40. At which layers of the OSI model does ethernet operate?
Collisions can decrease network performance.
8
A random delay helps prevent the stations from experiencing another collision during transmission.
A. physical layer b. DLL layer

41. What is a disadvantage of Telnet?
Rollover cable
It does not support encryption.
Resolve IPv4 addresses to MAC addresses.
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

42. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Window Size
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To prevent the receiver from being overwhelmed by incoming data.

43. 2 features that make switches preferable to hubs
Ctrl + Shift + 6
A. minimizing of collisions b. division into broadcast domains
A. next-hop b. metric/interface c. destination network address
0 to 1023

44. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Binary ANDing
32 bits
A. next-hop b. metric/interface c. destination network address

45. 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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Network Layer Packet
Host A
0 to 1023

46. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. replace a switch w/ a router b. subnet the new networks
IP is not properly installed
Hosts return to listen-before-transmit mode.
A. servers b. routers c. network printers

47. Network Protocols
It uses support from the lower layers to distinguish between connections to the service.
8
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Ctrl + Shift + 6

48. What is the role of MTA in handling email?
A. copper UTP b. optical fiber
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
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
It does not support encryption.

49. At which layer of the TCP/IP model does ethernet operate?
Network Access
A physical topology.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Resolve IPv4 addresses to MAC addresses.

50. What is the role of the OSI Application Layer?
A. MTA b. SMTP
A. it has centralized administration b. security is easier to enforce
Transport
It provides interface between applications on either end of the network.