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. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
It reduces unnecessary broadcasts.
Destination is not contacted before a packet is sent.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

2. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
RJ-45
Router
A. Physical b. Data Link

3. What is dinamically selected by the source host when forwarding data?
Network address
A. next-hop b. metric/interface c. destination network address
Source Port
A. goodput b. throughput c. bandwidth

4. What is the primary function of encapsulating packets into frames?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. Cat5 UTP b. Cat6 UTP
To facilitate the entry and exit of data on media.
Rollover cable

5. What are 2 email components used to forward mail between servers?
RJ-45
A. MTA b. SMTP
Collisions can decrease network performance.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

6. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. low overhead b. connectionless
A physical topology.
A. addressing b. error detection c. frame delimiting

7. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
IP is not properly installed
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host mobility

8. What do end devices do?
Collisions can decrease network performance.
Create signals that represent the bits in each frame for the media.
Originate data flow.
The magnetic field around the adjacent pairs of wire.

9. What is a characteristic of a single-mode fiber-optic cable?
A. copper UTP b. optical fiber
It uses lasers as the light source.
A. netstat -r b. route PRINT
Network

10. Which characteristics describe fiber optic cable?
It uses lasers as the light source.
Destination Network Address
A. next-hop b. metric/interface c. destination network address
A. not affected by EMI of RFI b. most expensive type of LAN cabling

11. 3 primary functions of the data link layer encapsulation
To facilitate the entry and exit of data on media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. addressing b. error detection c. frame delimiting
A. servers b. routers c. network printers

12. Which type of cable is most often associated w/ fiber-optic cable?
Show Interfaces
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A backbone cable.
Physical

13. How many bits make up an IPv4 address?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
UTP
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
32 bits

14. What can you identify when you examine the Network Layer header?
A. they initiate data exchanges b. they may upload data to servers
The destination host address.
Router
Collisions can decrease network performance.

15. Network Protocols
172.16.192.160
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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

16. What is a default gateway address?

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17. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. netstat -r b. route PRINT
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
255.255.255.224

18. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Window Size
Is used by the server to resolve names.
Create signals that represent the bits in each frame for the media.

19. What are 2 commands used to view a host routing table?
A. purpose b. geographic location c. ownership
255.255.255.0
A. netstat -r b. route PRINT
UDP

20. What causes crosstalk within cable pairs when using UTP?
Host A
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The magnetic field around the adjacent pairs of wire.
Fiber

21. What is a disadvantage of Telnet?
IP is not properly installed
Physical
The address of the router that the host will use to 'get to the other side'.
It does not support encryption.

22. What is a benefit of a WAN?
A. it has centralized administration b. security is easier to enforce
A. servers b. routers c. network printers
A physical topology.
Host mobility

23. What command can be used to determine if the router has experienced any input or output errors?
It uses lasers as the light source.
Show Interfaces
Identify processes or services that are communicating with end devices.
IP is not properly installed

24. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. larger address space b. data types and classes of service c. authentication and encryption
A. enable mode b. priviledge executive mode
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Is a layer of specific encapsulation.

25. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
The destination host address.
Router(config)# interface FastEthernet 0/1
They must wait until the first hosts finish transfering the media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

26. 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?
172.16.192.160
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Source and Destination Ports
Destination Network Address

27. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
Source Port
32 bits
No collisions will occur on this link.

28. What event occurs during the 3-way handshake?
A. router b. firewall
Source Port
TCP initializes the sequence numbers for the sessions.
Time-to-live (TTL)

29. To make a console connection from a comp to a Cisco router - what cable should be used?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Rollover cable
A. MTA b. SMTP
A. they initiate data exchanges b. they may upload data to servers

30. If you have a small network w/ 3 computers...
Console
Network
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
It uses support from the lower layers to distinguish between connections to the service.

31. What are the advantages of using a client-server model?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. it has centralized administration b. security is easier to enforce
Is used by the server to resolve names.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

32. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. Cat5 UTP b. Cat6 UTP
Network address
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
Minimal delays in data delivery.

33. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
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 physical topology.
Originate data flow.

34. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Network Layer
A. media sharing b. logical topology
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

35. When is a straight-through cable used in a network?
A. next-hop b. metric/interface c. destination network address
A random delay helps prevent the stations from experiencing another collision during transmission.
Time-to-live (TTL)
When connecting a host to a switch.

36. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
0 to 1023
A. hot keys b. context-sensitive c. command syntax check
No collisions will occur on this link.

37. An admin needs to keep contents private - which access method should he use?
SSH
A. router b. firewall
Network Access
A. Cat5 UTP b. Cat6 UTP

38. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. media sharing b. logical topology
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Host A

39. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
RJ-45
Any device whose backoff timer expires first.
Hub

40. What are 2 features of User Diagram Protocol (UDP)?
A. flow control b. session establishment c. numbering and sequencing
Console
A. low overhead b. connectionless
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

41. What command is used to change the default name to 'Costas'?
The address of the router that the host will use to 'get to the other side'.
Source Port
Router(config)# hostname Costas
Console interface

42. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
Host mobility
A. MTA b. SMTP
Host A

43. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
IP is not properly installed
Hosts return to listen-before-transmit mode.
A default gateway (router).

44. What can be a problem that is reduced by adding end-to-end addressing?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
UTP
It reduces unnecessary broadcasts.
Destination Network Address

45. 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
Supports error detection.
A. addressing b. error detection c. frame delimiting
A default gateway (router).

46. What determines the method of media access control?
Signal loss can be experienced.
A. Physical b. Data Link
A. it has centralized administration b. security is easier to enforce
A. media sharing b. logical topology

47. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network portion
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
255.255.255.0

48. In business LANs - which connector is used w/ twisted-pair networking cable?
The physical address is added.
Next-Hop Address
RJ-45
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

49. What is the role of the OSI Application Layer?
Originate data flow.
Network Layer Packet
It provides interface between applications on either end of the network.
Hub

50. At which layer of the TCP/IP model does ethernet operate?
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
When connecting a host to a switch.
Network Access
Source and Destination IP address