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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 sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. next-hop b. metric/interface c. destination network address
MAC
Minimal delays in data delivery.
A random delay helps prevent the stations from experiencing another collision during transmission.

2. What is a benefit of a WAN?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Host mobility
Resolve IPv4 addresses to MAC addresses.
Supports error detection.

3. 3 common problems w/ a large network
UDP
A. performance degradation b. security issues c. host identification
A. perform degradation b. security issues c. host identification
A. identifies the communicating applications b. identifies multiple conversations between the hosts

4. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
Logical Link Control sublayer
A random delay helps prevent the stations from experiencing another collision during transmission.
A. show startup-config b. show running-config
A. replace a switch w/ a router b. subnet the new networks

5. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Wireless
Switch
A default gateway (router).
Identify processes or services that are communicating with end devices.

6. What are the advantages of using a client-server model?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. it has centralized administration b. security is easier to enforce
No collisions will occur on this link.
TCP initializes the sequence numbers for the sessions.

7. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Network portion
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The MAC protocol can be very simple.
UDP

8. Which characteristics describe fiber optic cable?
It provides interface between applications on either end of the network.
To enable a receiving host to forward the data to the appropriate application.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Resolve IPv4 addresses to MAC addresses.

9. 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.
Logical Link Control sublayer
The magnetic field around the adjacent pairs of wire.
A. HTTP b. HTTPS

10. At which layers of the OSI model does ethernet operate?
Router(config)# interface FastEthernet 0/1
A. physical layer b. DLL layer
A. show startup-config b. show running-config
Destination is not contacted before a packet is sent.

11. What makes fiber preferable to copper for interconnecting buildings?
A. performance degradation b. security issues c. host identification
Create signals that represent the bits in each frame for the media.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. minimizing of collisions b. division into broadcast domains

12. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
FTP
80 (HTTP)
2046
Source Port

13. What determines the method of media access control?
It uses lasers as the light source.
A. media sharing b. logical topology
0 to 1023
Signal loss can be experienced.

14. What is the role of MTA in handling email?
Network Media Control
172.16.192.160
A physical topology.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

15. Where is the IOS file stored at?
Flash
Application Layer
A. replace a switch w/ a router b. subnet the new networks
A. enable mode b. priviledge executive mode

16. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
RJ-45
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

17. During encapsulation - what happens in the Data Link Layer?
A. decentralized resources b. resource sharing w/o a dedicated server
A. DB 60 b. Winchester 15-pin c. smart serial
The physical address is added.
It has expanded adressing capabilities.

18. If you have a small network w/ 3 computers...
SSH
Router(config)# hostname Costas
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
Originate data flow.

19. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
255.255.255.224
SSH
To prevent the receiver from being overwhelmed by incoming data.

20. What is dinamically selected by the source host when forwarding data?
A. enable mode b. priviledge executive mode
Source Port
The packets will be delivered and reassembled at destination.
SMB

21. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. DB 60 b. Winchester 15-pin c. smart serial
The magnetic field around the adjacent pairs of wire.
Network Layer Packet
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

22. What type of routing uses information that is manually entered into the routing table?
Identify processes or services that are communicating with end devices.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Source and Destination IP address
Static

23. What type of network cable is used between a terminal and a console port?
Rollover cable
It provides interface between applications on either end of the network.
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
The address of the router that the host will use to 'get to the other side'.

24. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Collisions can decrease network performance.
2046
32 bits

25. What is the primary purpose of Layer 4?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Media Control
Identify processes or services that are communicating with end devices.
No collisions will occur on this link.

26. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. performance degradation b. security issues c. host identification
Destination Network Address
A. hot keys b. context-sensitive c. command syntax check
32 bits

27. What is a protocol that provides connectionless network layer services?
Minimal delays in data delivery.
To facilitate the entry and exit of data on media.
SMB
IP Protocol

28. 3 statements about routes and their use
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
A. minimizing of collisions b. division into broadcast domains
A. media sharing b. logical topology
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

29. What is an automated service that matches resource names w/ required IP addresses?
Hosts return to listen-before-transmit mode.
A. hot keys b. context-sensitive c. command syntax check
DNS
It does not support encryption.

30. What can get you to an outside network?
A default gateway (router).
A. hot keys b. context-sensitive c. command syntax check
A. performance degradation b. security issues c. host identification
Logical Link Control sublayer

31. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
No collisions will occur on this link.
UTP

32. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Is a layer of specific encapsulation.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It uses support from the lower layers to distinguish between connections to the service.

33. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
The MAC protocol can be very simple.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

34. 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?
Ctrl + Shift + 6
A. low overhead b. connectionless
They must wait until the first hosts finish transfering the media.
When connecting a host to a switch.

35. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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
A. hot keys b. context-sensitive c. command syntax check

36. 2 characteristics of peer-2-peer
Originate data flow.
UTP
To enable a receiving host to forward the data to the appropriate application.
A. decentralized resources b. resource sharing w/o a dedicated server

37. 3 characteristics of valid Ethernet Layer 2 addresses
MAC
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
DNS
Show Interfaces

38. Statements that describe LAN
Static
Host mobility
A. non-deterministic b. less overhead c. collisions exist
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

39. 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
Fiber
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. copper UTP b. optical fiber
It reduces unnecessary broadcasts.

40. At which layer of the TCP/IP model does ethernet operate?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. they initiate data exchanges b. they may upload data to servers
Console interface
Network Access

41. What describes the purpose of default route?
As the commands are entered.
A. Cat5 UTP b. Cat6 UTP
Supports error detection.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

42. If there is a graphic representation of a company network wiring and equipment - What is this called?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A physical topology.
It provides interface between applications on either end of the network.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

43. What are 2 commands used to view a host routing table?
A. low overhead b. connectionless
A. netstat -r b. route PRINT
Resolve IPv4 addresses to MAC addresses.
Supports error detection.

44. What layer encapsulates segments into packets?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
Network Layer
MAC

45. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
It uses lasers as the light source.
A. enable mode b. priviledge executive mode
A. application b. presentation c. session d. transmision e. network f. data link g. physical

46. When is a straight-through cable used in a network?
Flash
Console interface
RJ-45
When connecting a host to a switch.

47. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
Fiber
Application Layer
A. enable mode b. priviledge executive mode

48. Default Gateway is incorrect on the host - What is the impact on the communications?
Wireless
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network portion
Any device whose backoff timer expires first.

49. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
Flash
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. servers b. routers c. network printers

50. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Minimal delays in data delivery.
UDP
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs