Test your basic knowledge |

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. Network Protocols
The physical address is added.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Rollover cable
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

2. What command can be used to determine if the router has experienced any input or output errors?
IP is not properly installed
Ctrl + Shift + 6
It has expanded adressing capabilities.
Show Interfaces

3. What is the proper order of the OSI Layers?
A. goodput b. throughput c. bandwidth
Show Interfaces
Flash
A. application b. presentation c. session d. transmision e. network f. data link g. physical

4. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. perform degradation b. security issues c. host identification
They must wait until the first hosts finish transfering the media.
A physical topology.
FTP

5. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A default gateway (router).
80 (HTTP)
It does not support encryption.
Network Layer Packet

6. 2 characteristics of clients in data networks
A. show startup-config b. show running-config
A. DB 60 b. Winchester 15-pin c. smart serial
A. they initiate data exchanges b. they may upload data to servers
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

7. 3 measures of data transfer
SSH
A. goodput b. throughput c. bandwidth
A. performance degradation b. security issues c. host identification
0 to 1023

8. What is the primary function of encapsulating packets into frames?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Static
To facilitate the entry and exit of data on media.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

9. What device can check for faults - integrity and performance of media?
OTDR
To enable a receiving host to forward the data to the appropriate application.
Transport
8

10. 2 most commonly used media types in ethernet networks
A. goodput b. throughput c. bandwidth
A. larger address space b. data types and classes of service c. authentication and encryption
A. copper UTP b. optical fiber
Source and Destination IP address

11. What causes crosstalk within cable pairs when using UTP?
255.255.255.0
A. enable mode b. priviledge executive mode
The magnetic field around the adjacent pairs of wire.
Host mobility

12. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
8
A backbone cable.
Wireless
A. media sharing b. logical topology

13. Where is the IOS file stored at?
UDP
Destination Network Address
Flash
32 bits

14. How many bits make up an IPv4 address?
A. non-deterministic b. less overhead c. collisions exist
The address of the router that the host will use to 'get to the other side'.
32 bits
Network

15. What is a component of a routing table entry?
Is used by the server to resolve names.
Flash
A physical topology.
Next-Hop Address

16. Which device is used to create or divide broadcast domains?
Host mobility
Router
DNS
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

17. What are 2 commands used to view a host routing table?
32 bits
A. netstat -r b. route PRINT
It uses support from the lower layers to distinguish between connections to the service.
DNS

18. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Hosts return to listen-before-transmit mode.
A. hot keys b. context-sensitive c. command syntax check
Binary ANDing
A. DNS b. SMTP c. POP

19. What makes fiber preferable to copper for interconnecting buildings?
To enable a receiving host to forward the data to the appropriate application.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It has expanded adressing capabilities.
Create signals that represent the bits in each frame for the media.

20. 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
Flash
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

21. What are 3 common problems w/ large networks?
TCP initializes the sequence numbers for the sessions.
A. flow control b. session establishment c. numbering and sequencing
A. they initiate data exchanges b. they may upload data to servers
A. perform degradation b. security issues c. host identification

22. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
8
A. goodput b. throughput c. bandwidth
A. non-deterministic b. less overhead c. collisions exist

23. What is the purpose of the preamble in an ethernet frame?
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. it has centralized administration b. security is easier to enforce
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

24. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
The magnetic field around the adjacent pairs of wire.
Router(config)# interface FastEthernet 0/1
80 (HTTP)
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

25. What can be a problem that is reduced by adding end-to-end addressing?
A. minimizing of collisions b. division into broadcast domains
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Ctrl + Shift + 6
It reduces unnecessary broadcasts.

26. Group of hosts that have identical bit patterns in the high order bits of their addresses
The magnetic field around the adjacent pairs of wire.
The MAC protocol can be very simple.
Network
A. larger address space b. data types and classes of service c. authentication and encryption

27. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Is used by the server to resolve names.
RJ-45
It uses lasers as the light source.

28. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
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 Access
A. not affected by EMI of RFI b. most expensive type of LAN cabling

29. 2 functions of encapsulation
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Window Size
A. Cat5 UTP b. Cat6 UTP
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

30. 3 common problems w/ a large network
SMB
Twisting of the cables
A. performance degradation b. security issues c. host identification
Signal loss can be experienced.

31. 3 features that allow TCP to realibly and accurately track the transmission of data
The packets will be delivered and reassembled at destination.
Identify processes or services that are communicating with end devices.
A. flow control b. session establishment c. numbering and sequencing
Hub

32. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Hosts return to listen-before-transmit mode.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. MTA b. SMTP
TCP initializes the sequence numbers for the sessions.

33. Default Gateway is incorrect on the host - What is the impact on the communications?
It uses lasers as the light source.
SSH
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

34. When a device is moved from one network to the other...?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
To prevent the receiver from being overwhelmed by incoming data.
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

35. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Next-Hop Address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Transport
SMB

36. When is a straight-through cable used in a network?
A. copper UTP b. optical fiber
A. media sharing b. logical topology
Router(config)# hostname Costas
When connecting a host to a switch.

37. What is the role of MTA in handling email?
Source and Destination IP address
A. low overhead b. connectionless
OTDR
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

38. 3 characteristics of valid Ethernet Layer 2 addresses
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. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Host A
80 (HTTP)

39. When a network service fails - which port is most often used to access a router for management purposes?
Time-to-live (TTL)
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Console
A. application b. services

40. What is the primary rope of the physical layer in transmitting data?
Console
UDP
Identify processes or services that are communicating with end devices.
Create signals that represent the bits in each frame for the media.

41. Important characteristic of UDP
Minimal delays in data delivery.
A. DB 60 b. Winchester 15-pin c. smart serial
255.255.255.224
UDP

42. An admin needs to keep contents private - which access method should he use?
It reduces unnecessary broadcasts.
No collisions will occur on this link.
Minimal delays in data delivery.
SSH

43. What characteristic of an UTP helps reduce interference?
Signal loss can be experienced.
Twisting of the cables
Source and Destination IP address
To facilitate the entry and exit of data on media.

44. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
0 to 1023
Destination is not contacted before a packet is sent.
Create signals that represent the bits in each frame for the media.

45. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
OTDR
It uses support from the lower layers to distinguish between connections to the service.
A. addressing b. error detection c. frame delimiting
Destination Network Address

46. What do the intermediary devices in the network do?
It has expanded adressing capabilities.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. next-hop b. metric/interface c. destination network address
SMB

47. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Network Media Control
The packets will be delivered and reassembled at destination.
Identify the device that allows local network computers to communicate w/ devices in other networks.
172.16.192.160

48. What application layer protocol is used to support file transfers between client and server?
Rollover cable
A. flow control b. session establishment c. numbering and sequencing
Router(config)# hostname Costas
FTP

49. What do end devices do?
Router(config)# interface FastEthernet 0/1
Destination is not contacted before a packet is sent.
255.255.255.0
Originate data flow.

50. At which layers of the OSI model does ethernet operate?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. physical layer b. DLL layer
To enable a receiving host to forward the data to the appropriate application.
IP is not properly installed