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. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
A. Cat5 UTP b. Cat6 UTP
The address of the router that the host will use to 'get to the other side'.
The magnetic field around the adjacent pairs of wire.

2. Why are port numbers included in the TCP header of a segment?
It uses lasers as the light source.
It reduces unnecessary broadcasts.
It uses support from the lower layers to distinguish between connections to the service.
To enable a receiving host to forward the data to the appropriate application.

3. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
255.255.255.0
Network Layer
To prevent the receiver from being overwhelmed by incoming data.

4. What is a characteristic of a logical point-to-point topology?
A. minimizing of collisions b. division into broadcast domains
The MAC protocol can be very simple.
A. it has centralized administration b. security is easier to enforce
Window Size

5. 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?
A backbone cable.
8
Destination Network Address
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

6. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
Is a layer of specific encapsulation.
2046
A. enable mode b. priviledge executive mode

7. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Transport
A. DB 60 b. Winchester 15-pin c. smart serial
MAC
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

8. What is a protocol that provides connectionless network layer services?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
IP Protocol
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
It does not support encryption.

9. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
A. HTTP b. HTTPS
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. identifies the communicating applications b. identifies multiple conversations between the hosts

10. What determines the method of media access control?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. netstat -r b. route PRINT
A. media sharing b. logical topology
Network address

11. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Window Size
A random delay helps prevent the stations from experiencing another collision during transmission.
To enable a receiving host to forward the data to the appropriate application.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

12. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
When connecting a host to a switch.
It uses lasers as the light source.
Binary ANDing
Collisions can decrease network performance.

13. When a network service fails - which port is most often used to access a router for management purposes?
It does not support encryption.
Console
A. physical layer b. DLL layer
A. not affected by EMI of RFI b. most expensive type of LAN cabling

14. What does the IEEE 802.2 standard represent in Ethernet technologies?
Router(config)# interface FastEthernet 0/1
SSH
Logical Link Control sublayer
Source Port

15. What is a component of a routing table entry?
It provides for the exchange of data over a common local media.
A. non-deterministic b. less overhead c. collisions exist
Ctrl + Shift + 6
Next-Hop Address

16. Network Protocols
The MAC protocol can be very simple.
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
Network Media Control

17. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
It has expanded adressing capabilities.
A. router b. firewall
It provides interface between applications on either end of the network.

18. How does the application layer on a server process multiple client requests for services?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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
Originate data flow.
It uses support from the lower layers to distinguish between connections to the service.

19. What is a benefit of a WAN?
Host mobility
It does not support encryption.
Fiber
A. it has centralized administration b. security is easier to enforce

20. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A default gateway (router).
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

21. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
When connecting a host to a switch.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Rollover cable
A. show startup-config b. show running-config

22. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
Hosts return to listen-before-transmit mode.
Minimal delays in data delivery.
Is used by the server to resolve names.

23. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
32 bits
Host A
Resolve IPv4 addresses to MAC addresses.
A. media sharing b. logical topology

24. Which portion of the network layer address does a router use to forward packets?
Network portion
OTDR
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Switch

25. What is the primary function of encapsulating packets into frames?
UTP
Router
To facilitate the entry and exit of data on media.
Application Layer

26. There are too many broadcasts on switches - what can be done?
IP Protocol
Static
A. media sharing b. logical topology
A. replace a switch w/ a router b. subnet the new networks

27. 3 statements of media acess control
Show Interfaces
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Next-Hop 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

28. When is a straight-through cable used in a network?
Console interface
When connecting a host to a switch.
32 bits
No collisions will occur on this link.

29. What networking devices are recommended to be assigned static IP addresses?
To facilitate the entry and exit of data on media.
A default gateway (router).
A. servers b. routers c. network printers
SMB

30. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Twisting of the cables
2046
The physical address is added.

31. What is dinamically selected by the source host when forwarding data?
It reduces unnecessary broadcasts.
Source Port
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
No collisions will occur on this link.

32. What characteristic of an UTP helps reduce interference?
When connecting a host to a switch.
A. it has centralized administration b. security is easier to enforce
OTDR
Twisting of the cables

33. What method of signal transmission uses radio waves to carry signals?
Wireless
A. router b. firewall
A. DNS b. SMTP c. POP
A. physical layer b. DLL layer

34. When destination network is not in the routing table - What are 2 actions the router might take?
UDP
A. application b. services
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry

35. 3 factors that should be considered when implementing Layer 2 protocols
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Router(config)# interface FastEthernet 0/1
UDP
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

36. 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. HTTP b. HTTPS
A. purpose b. geographic location c. ownership
Logical Link Control sublayer

37. What correctly describes a MAC address?
RJ-45
FTP
Hub
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

38. statements of IP adressing
Destination Network Address
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
Network Media Control
RJ-45

39. What information is added during encapsulation at OSI Layer 3?
32 bits
A. non-deterministic b. less overhead c. collisions exist
The destination host address.
Source and Destination IP address

40. 2 functions of encapsulation
Is a layer of specific encapsulation.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Router(config)# hostname Costas
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

41. What is the primary purpose of ARP?
Next-Hop Address
A. flow control b. session establishment c. numbering and sequencing
Resolve IPv4 addresses to MAC addresses.
IP is not properly installed

42. What device can check for faults - integrity and performance of media?
OTDR
A. minimizing of collisions b. division into broadcast domains
Ctrl + Shift + 6
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

43. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A. physical layer b. DLL layer
The magnetic field around the adjacent pairs of wire.
No collisions will occur on this link.

44. What are the advantages of using a client-server model?
To enable a receiving host to forward the data to the appropriate application.
A. it has centralized administration b. security is easier to enforce
Transport
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

45. What do end devices do?
A physical topology.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. physical layer b. DLL layer
Originate data flow.

46. Which characteristics describe fiber optic cable?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Window Size
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

47. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Show Interfaces
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
255.255.255.224

48. Which 2 options represent Layer 4 addressing?
The physical address is added.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. DNS b. SMTP c. POP
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 purpose of resource records in DNS?
0 to 1023
Is used by the server to resolve names.
Network
The packets will be delivered and reassembled at destination.

50. What can get you to an outside network?
IP Protocol
A default gateway (router).
Network Layer
Console interface