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. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
A. addressing b. error detection c. frame delimiting
Originate data flow.
As the commands are entered.

2. How does the application layer on a server process multiple client requests for services?
A. they initiate data exchanges b. they may upload data to servers
It uses support from the lower layers to distinguish between connections to the service.
A. it has centralized administration b. security is easier to enforce
A. not affected by EMI of RFI b. most expensive type of LAN cabling

3. 3 primary functions of the data link layer encapsulation
A backbone cable.
To facilitate the entry and exit of data on media.
A. addressing b. error detection c. frame delimiting
SSH

4. What info is found in the TCP and UDP header info?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network portion
Source and Destination Ports
A. copper UTP b. optical fiber

5. 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. servers b. routers c. network printers
To enable a receiving host to forward the data to the appropriate application.
Network Media Control

6. What is a default gateway address?

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7. Which 2 options represent Layer 4 addressing?
Router(config)# hostname Costas
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Collisions can decrease network performance.

8. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
To prevent the receiver from being overwhelmed by incoming data.
255.255.255.224
Is a layer of specific encapsulation.
Switch

9. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Host mobility
SMB
RJ-45
A. Physical b. Data Link

10. What device can check for faults - integrity and performance of media?
OTDR
Network Access
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It has expanded adressing capabilities.

11. 3 measures of data transfer
A. hot keys b. context-sensitive c. command syntax check
A. goodput b. throughput c. bandwidth
32 bits
Destination Network Address

12. 2 characteristics of peer-2-peer
A. they initiate data exchanges b. they may upload data to servers
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. decentralized resources b. resource sharing w/o a dedicated server
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

13. What information is added during encapsulation at OSI Layer 3?
0 to 1023
A. performance degradation b. security issues c. host identification
Source and Destination IP address
DNS

14. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Is used by the server to resolve names.
A. enable mode b. priviledge executive mode
Switch
Identify processes or services that are communicating with end devices.

15. Which combination of keys can be used to interrupt a ping or traceroute process?
IP Protocol
Ctrl + Shift + 6
A. Physical b. Data Link
To facilitate the entry and exit of data on media.

16. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Is used by the server to resolve names.
A. DB 60 b. Winchester 15-pin c. smart serial
172.16.192.160

17. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
A. Physical b. Data Link
A. DB 60 b. Winchester 15-pin c. smart serial
Source and Destination Ports

18. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Hub
Rollover cable
Ctrl + Shift + 6

19. What is the purpose of a default gateway?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Host mobility
Application Layer
Identify the device that allows local network computers to communicate w/ devices in other networks.

20. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Logical Link Control sublayer
Network Layer Packet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. physical layer b. DLL layer

21. What is the primary purpose of Layer 4?
A. copper UTP b. optical fiber
They must wait until the first hosts finish transfering the media.
Identify processes or services that are communicating with end devices.
It uses support from the lower layers to distinguish between connections to the service.

22. 3 statements about routes and their use
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
Host mobility
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Source Port

23. If there is a graphic representation of a company network wiring and equipment - What is this called?
Application Layer
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
Signal loss can be experienced.
A physical topology.

24. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
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
Twisting of the cables
Hub

25. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Host A
RJ-45

26. What event occurs during the 3-way handshake?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
TCP initializes the sequence numbers for the sessions.
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

27. What application layer protocol is used to support file transfers between client and server?
FTP
Is a layer of specific encapsulation.
Router
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

28. What are 3 pieces of info about a route contained in a routing table?
The address of the router that the host will use to 'get to the other side'.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. copper UTP b. optical fiber
A. next-hop b. metric/interface c. destination network address

29. 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
Transport
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
Flash

30. What command can be used to determine if the router has experienced any input or output errors?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. next-hop b. metric/interface c. destination network address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Show Interfaces

31. In a connectionless system - What is correct?
To enable a receiving host to forward the data to the appropriate application.
Destination is not contacted before a packet is sent.
255.255.255.0
The magnetic field around the adjacent pairs of wire.

32. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. larger address space b. data types and classes of service c. authentication and encryption
It uses lasers as the light source.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

33. What layer encapsulates segments into packets?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. next-hop b. metric/interface c. destination network address
A backbone cable.
Network Layer

34. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
2046
Network address
The address of the router that the host will use to 'get to the other side'.
Fiber

35. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
MAC
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
255.255.255.224

36. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A. goodput b. throughput c. bandwidth
Network Access
8

37. What are the advantages of using a client-server model?
A. DB 60 b. Winchester 15-pin c. smart serial
A. DNS b. SMTP c. POP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. it has centralized administration b. security is easier to enforce

38. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
A. Physical b. Data Link
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A physical topology.

39. At which layer of the TCP/IP model does ethernet operate?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It has expanded adressing capabilities.
Network Access
255.255.255.0

40. Where is the IOS file stored at?
Binary ANDing
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Flash
80 (HTTP)

41. Which layer supplies services and allows user interface?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Time-to-live (TTL)
A. minimizing of collisions b. division into broadcast domains
Application Layer

42. What makes fiber preferable to copper for interconnecting buildings?
To prevent the receiver from being overwhelmed by incoming data.
A. addressing b. error detection c. frame delimiting
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

43. 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?
Switch
8
Network Layer
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

44. 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?
They must wait until the first hosts finish transfering the media.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. servers b. routers c. network printers
8

45. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Fiber
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
RJ-45
Router(config)# interface FastEthernet 0/1

46. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
Router(config)# interface FastEthernet 0/1
Network Access
A. Cat5 UTP b. Cat6 UTP

47. When a network service fails - which port is most often used to access a router for management purposes?
A. addressing b. error detection c. frame delimiting
255.255.255.224
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Console

48. Important characteristic of UDP
A. perform degradation b. security issues c. host identification
Minimal delays in data delivery.
A. they initiate data exchanges b. they may upload data to servers
As the commands are entered.

49. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Create signals that represent the bits in each frame for the media.
Fiber
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
0 to 1023

50. To make a console connection from a comp to a Cisco router - what cable should be used?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. DNS b. SMTP c. POP
Rollover cable
Network Layer Packet