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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. 3 factors that should be considered when implementing Layer 2 protocols
To enable a receiving host to forward the data to the appropriate application.
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
2046

2. 2 functions of encapsulation
When connecting a host to a switch.
A. minimizing of collisions b. division into broadcast domains
Network portion
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

3. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
Rollover cable
Window Size
A. not affected by EMI of RFI b. most expensive type of LAN cabling

4. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Rollover cable
It provides for the exchange of data over a common local media.
A. hot keys b. context-sensitive c. command syntax check

5. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
2046
Is a layer of specific encapsulation.
A. servers b. routers c. network printers
Fiber

6. What is the purpose of the TCP/IP Network Application Layer?
A. purpose b. geographic location c. ownership
A. physical layer b. DLL layer
Network Media Control
A. decentralized resources b. resource sharing w/o a dedicated server

7. What is a drawback of the CSMA/CD access method?
A. physical layer b. DLL layer
Console
Collisions can decrease network performance.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

8. When a network service fails - which port is most often used to access a router for management purposes?
No collisions will occur on this link.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Console
As the commands are entered.

9. What is PDU?
0 to 1023
Next-Hop Address
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Is a layer of specific encapsulation.

10. What is the purpose of resource records in DNS?
Resolve IPv4 addresses to MAC addresses.
Is used by the server to resolve names.
A. low overhead b. connectionless
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

11. What 2 type of cables would most commonly be used for new runs?
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. Cat5 UTP b. Cat6 UTP
A. physical layer b. DLL layer
0 to 1023

12. What is the function of the DLL?
It provides for the exchange of data over a common local media.
Is a layer of specific encapsulation.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
UTP

13. To make a console connection from a comp to a Cisco router - what cable should be used?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Rollover cable
Router(config)# interface FastEthernet 0/1
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

14. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
The packets will be delivered and reassembled at destination.
Identify the device that allows local network computers to communicate w/ devices in other networks.
UTP
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

15. What is the proper order of the OSI Layers?
A. DB 60 b. Winchester 15-pin c. smart serial
It does not support encryption.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
MAC

16. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. enable mode b. priviledge executive mode
255.255.255.0
Console
Hub

17. When a device is moved from one network to the other...?
A. purpose b. geographic location c. ownership
Rollover cable
Console interface
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

18. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
MAC
Binary ANDing
A. physical layer b. DLL layer

19. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
MAC
Router(config)# interface FastEthernet 0/1
Switch
Destination Network Address

20. What is a component of a routing table entry?
Network Layer Packet
Next-Hop Address
Physical
Identify processes or services that are communicating with end devices.

21. 2 characteristics of clients in data networks
Destination is not contacted before a packet is sent.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. they initiate data exchanges b. they may upload data to servers
Minimal delays in data delivery.

22. What kind of problems are caused by excessive broadcast traffic on network segments?
When connecting a host to a switch.
Show Interfaces
Supports error detection.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

23. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. servers b. routers c. network printers
FTP
A. purpose b. geographic location c. ownership
Network

24. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Is used by the server to resolve names.
A. DB 60 b. Winchester 15-pin c. smart serial
SMB
2046

25. 3 features of IPv6
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. larger address space b. data types and classes of service c. authentication and encryption
A. enable mode b. priviledge executive mode
80 (HTTP)

26. An admin needs to keep contents private - which access method should he use?
Ctrl + Shift + 6
A. it has centralized administration b. security is easier to enforce
SSH
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

27. 3 terms that define the forms of help available within the Cisco IOS
A. HTTP b. HTTPS
SSH
A. hot keys b. context-sensitive c. command syntax check
Network Layer Packet

28. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. non-deterministic b. less overhead c. collisions exist
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Is used by the server to resolve names.

29. Which portion of the network layer address does a router use to forward packets?
Originate data flow.
The physical address is added.
Network portion
Signal loss can be experienced.

30. What is an automated service that matches resource names w/ required IP addresses?
Window Size
Collisions can decrease network performance.
DNS
Identify the device that allows local network computers to communicate w/ devices in other networks.

31. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. performance degradation b. security issues c. host identification
172.16.192.160
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Binary ANDing

32. If you have a full-duplex operational network - what can happen?
Router(config)# hostname Costas
A. low overhead b. connectionless
UDP
No collisions will occur on this link.

33. What is a default gateway address?

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34. 3 properties of peer-2-peer applications
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
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
OTDR
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

35. Which IP packet field will prevent endless loops?
A. non-deterministic b. less overhead c. collisions exist
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
Time-to-live (TTL)
Identify the device that allows local network computers to communicate w/ devices in other networks.

36. 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. flow control b. session establishment c. numbering and sequencing
Logical Link Control sublayer
8
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

37. What info is found in the TCP and UDP header info?
Rollover cable
Source and Destination Ports
A. application b. services
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

38. Why are port numbers included in the TCP header of a segment?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
To enable a receiving host to forward the data to the appropriate application.
The physical address is added.

39. What can you identify when you examine the Network Layer header?
Network Layer Packet
The destination host address.
A. show startup-config b. show running-config
A. next-hop b. metric/interface c. destination network address

40. 3 facts about the network portion of an IPv4 address
Show Interfaces
A. addressing b. error detection c. frame delimiting
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. servers b. routers c. network printers

41. What causes crosstalk within cable pairs when using UTP?
The physical address is added.
The magnetic field around the adjacent pairs of wire.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. MTA b. SMTP

42. How many bits make up an IPv4 address?
A. servers b. routers c. network printers
Router
Host A
32 bits

43. What is a disadvantage of Telnet?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
It does not support encryption.
The destination host address.
No collisions will occur on this link.

44. What is a benefit of a WAN?
255.255.255.0
Host mobility
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
32 bits

45. When is a straight-through cable used in a network?
A. decentralized resources b. resource sharing w/o a dedicated server
Create signals that represent the bits in each frame for the media.
Ctrl + Shift + 6
When connecting a host to a switch.

46. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Rollover cable
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
2046

47. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. show startup-config b. show running-config
Rollover cable
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Next-Hop Address

48. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Router(config)# hostname Costas
It provides interface between applications on either end of the network.

49. What is a protocol that provides connectionless network layer services?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Next-Hop Address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
IP Protocol

50. There are too many broadcasts on switches - what can be done?
Destination Network Address
It uses support from the lower layers to distinguish between connections to the service.
A. replace a switch w/ a router b. subnet the new networks
Identify the device that allows local network computers to communicate w/ devices in other networks.