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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. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. it has centralized administration b. security is easier to enforce
A random delay helps prevent the stations from experiencing another collision during transmission.
It provides for the exchange of data over a common local media.
Create signals that represent the bits in each frame for the media.

2. What determines the method of media access control?
A. media sharing b. logical topology
Network
Window Size
Supports error detection.

3. What is the primary function of encapsulating packets into frames?
Physical
The physical address is added.
A random delay helps prevent the stations from experiencing another collision during transmission.
To facilitate the entry and exit of data on media.

4. 3 functions of the upper data link sublayer in the OSI model
A. purpose b. geographic location c. ownership
It uses support from the lower layers to distinguish between connections to the service.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Router(config)# hostname Costas

5. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. Cat5 UTP b. Cat6 UTP
Switch
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The address of the router that the host will use to 'get to the other side'.

6. What is the purpose of a default gateway?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Network portion

7. What is a default gateway address?

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8. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Host mobility
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Supports error detection.

9. What describes the purpose of default route?
The MAC protocol can be very simple.
Create signals that represent the bits in each frame for the media.
Is a layer of specific encapsulation.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

10. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The MAC protocol can be very simple.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Rollover cable

11. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Host A
Physical
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
2046

12. Why are port numbers included in the TCP header of a segment?
UDP
Host mobility
To enable a receiving host to forward the data to the appropriate application.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

13. What is the primary purpose of ARP?
Network portion
Resolve IPv4 addresses to MAC addresses.
A. goodput b. throughput c. bandwidth
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

14. If you have a full-duplex operational network - what can happen?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
No collisions will occur on this link.
A. servers b. routers c. network printers
Originate data flow.

15. What is the primary rope of the physical layer in transmitting data?
Host mobility
A. netstat -r b. route PRINT
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
Create signals that represent the bits in each frame for the media.

16. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Is used by the server to resolve names.
Logical Link Control sublayer
A. next-hop b. metric/interface c. destination network address
Transport

17. 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. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
UDP
Hub
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

18. What do end devices do?
Transport
Network portion
A. show startup-config b. show running-config
Originate data flow.

19. What application layer protocol is used to support file transfers between client and server?
It provides interface between applications on either end of the network.
Physical
FTP
A. it has centralized administration b. security is easier to enforce

20. 2 most commonly used media types in ethernet networks
Network Layer Packet
A. copper UTP b. optical fiber
Fiber
A. MTA b. SMTP

21. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
255.255.255.224
2046
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. minimizing of collisions b. division into broadcast domains

22. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
As the commands are entered.
Logical Link Control sublayer
172.16.192.160
Window Size

23. What is dinamically selected by the source host when forwarding data?
Source Port
Resolve IPv4 addresses to MAC addresses.
Destination Network Address
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

24. When is a straight-through cable used in a network?
Destination is not contacted before a packet is sent.
When connecting a host to a switch.
Application Layer
A. DB 60 b. Winchester 15-pin c. smart serial

25. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. Physical b. Data Link
MAC
UDP
0 to 1023

26. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
A. addressing b. error detection c. frame delimiting
A. enable mode b. priviledge executive mode
Window Size

27. What is a component of a routing table entry?
Rollover cable
Next-Hop Address
Minimal delays in data delivery.
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

28. 3 factors that should be considered when implementing Layer 2 protocols
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Signal loss can be experienced.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. larger address space b. data types and classes of service c. authentication and encryption

29. What are 3 properties of contention-based media access for a shared media?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. addressing b. error detection c. frame delimiting
A. non-deterministic b. less overhead c. collisions exist
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

30. statements of IP adressing
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
Logical Link Control sublayer
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
The physical address is added.

31. What characteristic of an UTP helps reduce interference?
Supports error detection.
Twisting of the cables
It provides interface between applications on either end of the network.
The MAC protocol can be very simple.

32. 2 characteristics of clients in data networks
Switch
A. decentralized resources b. resource sharing w/o a dedicated server
IP Protocol
A. they initiate data exchanges b. they may upload data to servers

33. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Source and Destination IP address
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
DNS
Binary ANDing

34. 3 primary functions of the data link layer encapsulation
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Network Access
A. addressing b. error detection c. frame delimiting
Binary ANDing

35. When do changes take effect in a Cisco router?
To enable a receiving host to forward the data to the appropriate application.
Originate data flow.
A. minimizing of collisions b. division into broadcast domains
As the commands are entered.

36. What info is found in the TCP and UDP header info?
Network
Source and Destination Ports
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It reduces unnecessary broadcasts.

37. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A default gateway (router).
The MAC protocol can be very simple.
A. Cat5 UTP b. Cat6 UTP

38. What can get you to an outside network?
A default gateway (router).
Collisions can decrease network performance.
Console
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

39. What type of routing uses information that is manually entered into the routing table?
A. low overhead b. connectionless
Static
Ctrl + Shift + 6
A. MTA b. SMTP

40. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
The address of the router that the host will use to 'get to the other side'.
Create signals that represent the bits in each frame for the media.
Is a layer of specific encapsulation.

41. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network portion
The MAC protocol can be very simple.
Next-Hop Address

42. What is the primary purpose of Layer 4?
Network
Identify processes or services that are communicating with end devices.
The packets will be delivered and reassembled at destination.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

43. 3 common problems w/ a large network
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Console interface
A. performance degradation b. security issues c. host identification
SMB

44. What causes crosstalk within cable pairs when using UTP?
80 (HTTP)
Destination is not contacted before a packet is sent.
A. Physical b. Data Link
The magnetic field around the adjacent pairs of wire.

45. At which layer of the TCP/IP model does ethernet operate?
Network Access
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Wireless
Rollover cable

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?
Resolve IPv4 addresses to MAC addresses.
80 (HTTP)
Router
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

47. If there is a graphic representation of a company network wiring and equipment - What is this called?
Console interface
A. MTA b. SMTP
A. application b. services
A physical topology.

48. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
A. minimizing of collisions b. division into broadcast domains
Is a layer of specific encapsulation.
Fiber

49. 3 facts about the network portion of an IPv4 address
2046
Router(config)# interface FastEthernet 0/1
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. replace a switch w/ a router b. subnet the new networks

50. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
A. HTTP b. HTTPS
Console interface
A. DNS b. SMTP c. POP