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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 information is added during encapsulation at OSI Layer 3?
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
Binary ANDing
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Source and Destination IP address

2. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Signal loss can be experienced.
UTP
A. it has centralized administration b. security is easier to enforce

3. 3 functions of the upper data link sublayer in the OSI model
A. purpose b. geographic location c. ownership
No collisions will occur on this link.
Rollover cable
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

4. What is the purpose of a default gateway?
Source and Destination Ports
A. show startup-config b. show running-config
IP Protocol
Identify the device that allows local network computers to communicate w/ devices in other networks.

5. What type of routing uses information that is manually entered into the routing table?
Static
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. media sharing b. logical topology
A. flow control b. session establishment c. numbering and sequencing

6. Default Gateway is incorrect on the host - What is the impact on the communications?
A. replace a switch w/ a router b. subnet the new networks
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The MAC protocol can be very simple.
A. servers b. routers c. network printers

7. If you have a full-duplex operational network - what can happen?
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
No collisions will occur on this link.
It uses support from the lower layers to distinguish between connections to the service.
They must wait until the first hosts finish transfering the media.

8. What are the advantages of using a client-server model?
A. hot keys b. context-sensitive c. command syntax check
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. it has centralized administration b. security is easier to enforce
A. decentralized resources b. resource sharing w/o a dedicated server

9. What is a protocol that provides connectionless network layer services?
A. router b. firewall
IP Protocol
A. low overhead b. connectionless
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

10. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Supports error detection.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

11. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Time-to-live (TTL)
A. non-deterministic b. less overhead c. collisions exist
A. Physical b. Data Link
UTP

12. When destination network is not in the routing table - What are 2 actions the router might take?
A. non-deterministic b. less overhead c. collisions exist
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Static
A. the router will discard the packet b. the router will send a time exceeded message to the source host

13. What networking devices are recommended to be assigned static IP addresses?
A. show startup-config b. show running-config
Minimal delays in data delivery.
A. servers b. routers c. network printers
Resolve IPv4 addresses to MAC addresses.

14. What 2 type of cables would most commonly be used for new runs?
It does not support encryption.
Show Interfaces
A. Cat5 UTP b. Cat6 UTP
The destination host address.

15. How many bits make up an IPv4 address?
8
Destination is not contacted before a packet is sent.
32 bits
Time-to-live (TTL)

16. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. copper UTP b. optical fiber
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

17. What are 2 protocols for transfering web resources?
Any device whose backoff timer expires first.
Originate data flow.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. HTTP b. HTTPS

18. Important characteristic of UDP
Minimal delays in data delivery.
Collisions can decrease network performance.
Host A
The magnetic field around the adjacent pairs of wire.

19. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
To enable a receiving host to forward the data to the appropriate application.
The physical address is added.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Rollover cable

20. Why are port numbers included in the TCP header of a segment?
A. media sharing b. logical topology
Network Media Control
Identify processes or services that are communicating with end devices.
To enable a receiving host to forward the data to the appropriate application.

21. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
UDP
Network Layer Packet
They must wait until the first hosts finish transfering the media.

22. What is a benefit of a WAN?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host mobility
Hub
Source Port

23. At which layer of the TCP/IP model does ethernet operate?
Network Access
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Host A
The packets will be delivered and reassembled at destination.

24. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
The packets will be delivered and reassembled at destination.
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.
A. enable mode b. priviledge executive mode

25. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Network Layer
Source Port
Source and Destination IP address

26. 3 features of IPv6
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. larger address space b. data types and classes of service c. authentication and encryption
DNS
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

27. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Network Access
80 (HTTP)
A physical topology.
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

28. 3 factors that should be considered when implementing Layer 2 protocols
Identify processes or services that are communicating with end devices.
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Application Layer

29. What are 2 commands used to view a host routing table?
Flash
Application Layer
A. netstat -r b. route PRINT
A. addressing b. error detection c. frame delimiting

30. 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?
A. larger address space b. data types and classes of service c. authentication and encryption
They must wait until the first hosts finish transfering the media.
The destination host address.
Binary ANDing

31. What device can check for faults - integrity and performance of media?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. replace a switch w/ a router b. subnet the new networks
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
OTDR

32. What is the primary purpose of Layer 4?
A. purpose b. geographic location c. ownership
Identify processes or services that are communicating with end devices.
Hosts return to listen-before-transmit mode.
A. DNS b. SMTP c. POP

33. What is a disadvantage of Telnet?
Window Size
IP is not properly installed
UTP
It does not support encryption.

34. 3 measures of data transfer
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Rollover cable
It has expanded adressing capabilities.
A. goodput b. throughput c. bandwidth

35. What causes crosstalk within cable pairs when using UTP?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
The magnetic field around the adjacent pairs of wire.
A. router b. firewall
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

36. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Source and Destination Ports
Console interface
Router(config)# interface FastEthernet 0/1
A physical topology.

37. 2 characteristics of peer-2-peer
A. DB 60 b. Winchester 15-pin c. smart serial
To prevent the receiver from being overwhelmed by incoming data.
A. decentralized resources b. resource sharing w/o a dedicated server
A. it has centralized administration b. security is easier to enforce

38. Intermediary devices used to implement security between networks
A. router b. firewall
Router
Create signals that represent the bits in each frame for the media.
MAC

39. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Identify processes or services that are communicating with end devices.
2046
Flash
Network Layer Packet

40. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
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
Transport
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
TCP initializes the sequence numbers for the sessions.

41. Which 2 options represent Layer 4 addressing?
Window Size
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Source and Destination IP address
A. Physical b. Data Link

42. 2 most commonly used media types in ethernet networks
A. enable mode b. priviledge executive mode
A. larger address space b. data types and classes of service c. authentication and encryption
A. copper UTP b. optical fiber
255.255.255.0

43. What characteristic of an UTP helps reduce interference?
Originate data flow.
Source and Destination Ports
172.16.192.160
Twisting of the cables

44. What do end devices do?
Originate data flow.
0 to 1023
255.255.255.0
A. hot keys b. context-sensitive c. command syntax check

45. What correctly describes a MAC address?
Wireless
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Physical

46. 3 statements of media acess control
The destination host address.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
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 random delay helps prevent the stations from experiencing another collision during transmission.

47. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Network Layer
IP is not properly installed
Fiber
172.16.192.160

48. What is a characteristic of a logical point-to-point topology?
A. enable mode b. priviledge executive mode
Destination is not contacted before a packet is sent.
The MAC protocol can be very simple.
A. next-hop b. metric/interface c. destination network address

49. What is the purpose of the preamble in an ethernet frame?
Signal loss can be experienced.
A. replace a switch w/ a router b. subnet the new networks
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

50. When a network service fails - which port is most often used to access a router for management purposes?
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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
Console