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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. In a connectionless system - What is correct?
It does not support encryption.
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
Destination is not contacted before a packet is sent.
It provides interface between applications on either end of the network.

2. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. enable mode b. priviledge executive mode
Fiber
Flash
Router(config)# hostname Costas

3. What is an automated service that matches resource names w/ required IP addresses?
A. show startup-config b. show running-config
Router(config)# interface FastEthernet 0/1
DNS
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

4. 3 terms that define the forms of help available within the Cisco IOS
A. router b. firewall
It uses lasers as the light source.
A. hot keys b. context-sensitive c. command syntax check
A. non-deterministic b. less overhead c. collisions exist

5. What layer encapsulates segments into packets?
To prevent the receiver from being overwhelmed by incoming data.
Network Layer
Rollover cable
Destination is not contacted before a packet is sent.

6. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
172.16.192.160
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
Fiber

7. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A default gateway (router).
Is a layer of specific encapsulation.
Hub
Physical

8. What is a drawback of the CSMA/CD access method?
Destination Network Address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Collisions can decrease network performance.

9. What causes crosstalk within cable pairs when using UTP?
A. DB 60 b. Winchester 15-pin c. smart serial
UDP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The magnetic field around the adjacent pairs of wire.

10. Which device is used to create or divide broadcast domains?
Signal loss can be experienced.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Router
Wireless

11. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The physical address is added.
A. show startup-config b. show running-config

12. What is the purpose of resource records in DNS?
A. show startup-config b. show running-config
Router(config)# hostname Costas
MAC
Is used by the server to resolve names.

13. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A default gateway (router).

14. What are 3 common problems w/ large networks?
Ctrl + Shift + 6
A. perform degradation b. security issues c. host identification
A. copper UTP b. optical fiber
A. show startup-config b. show running-config

15. At which layer of the TCP/IP model does ethernet operate?
IP Protocol
Network Access
Console interface
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

16. What do the intermediary devices in the network do?
DNS
Logical Link Control sublayer
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
172.16.192.160

17. What 2 type of cables would most commonly be used for new runs?
Network
A. Cat5 UTP b. Cat6 UTP
A. physical layer b. DLL layer
A. MTA b. SMTP

18. 3 facts about the network portion of an IPv4 address
Network Layer Packet
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Source and Destination IP address

19. What is a benefit of a WAN?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Source Port
The address of the router that the host will use to 'get to the other side'.
Host mobility

20. When a network service fails - which port is most often used to access a router for management purposes?
FTP
A. physical layer b. DLL layer
32 bits
Console

21. Which layer supplies services and allows user interface?
Fiber
To enable a receiving host to forward the data to the appropriate application.
A. purpose b. geographic location c. ownership
Application Layer

22. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A random delay helps prevent the stations from experiencing another collision during transmission.
A. MTA b. SMTP
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

23. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
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
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
SMB
Static

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?
80 (HTTP)
Transport
A. replace a switch w/ a router b. subnet the new networks
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

25. What are 2 protocols for transfering web resources?
The packets will be delivered and reassembled at destination.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. HTTP b. HTTPS
Network

26. If there is a graphic representation of a company network wiring and equipment - What is this called?
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 physical topology.
It does not support encryption.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

27. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. it has centralized administration b. security is easier to enforce
RJ-45
Network address
A. non-deterministic b. less overhead c. collisions exist

28. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A physical topology.
A. perform degradation b. security issues c. host identification
Binary ANDing
A. hot keys b. context-sensitive c. command syntax check

29. 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. media sharing b. logical topology
To facilitate the entry and exit of data on media.

30. 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?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
2046
A. Physical b. Data Link
It does not support encryption.

31. What do end devices do?
A. flow control b. session establishment c. numbering and sequencing
Destination is not contacted before a packet is sent.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Originate data flow.

32. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
When connecting a host to a switch.
A. router b. firewall
A. replace a switch w/ a router b. subnet the new networks

33. Which IP packet field will prevent endless loops?
OTDR
Source and Destination IP address
Identify processes or services that are communicating with end devices.
Time-to-live (TTL)

34. What is a characteristic of a logical point-to-point topology?
It does not support encryption.
The MAC protocol can be very simple.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The destination host address.

35. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
It reduces unnecessary broadcasts.
A default gateway (router).
Network Media Control

36. What is the purpose of the preamble in an ethernet frame?
MAC
A. media sharing b. logical topology
SMB
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

37. 3 factors that should be considered when implementing Layer 2 protocols
A. it has centralized administration b. security is easier to enforce
MAC
A. servers b. routers c. network printers
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

38. 3 primary functions of the data link layer encapsulation
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. 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. addressing b. error detection c. frame delimiting
255.255.255.0

39. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
The packets will be delivered and reassembled at destination.
Hosts return to listen-before-transmit mode.
Application Layer

40. What is dinamically selected by the source host when forwarding data?
A. netstat -r b. route PRINT
0 to 1023
Source Port
It has expanded adressing capabilities.

41. What are key considering factors when grouping hosts into common networks?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. purpose b. geographic location c. ownership
Binary ANDing
The physical address is added.

42. 2 features that make switches preferable to hubs
2046
Supports error detection.
A. minimizing of collisions b. division into broadcast domains
Window Size

43. What is the primary reason for developing IPv6?
A. router b. firewall
A backbone cable.
It has expanded adressing capabilities.
A. hot keys b. context-sensitive c. command syntax check

44. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
UTP
Supports error detection.
Hosts return to listen-before-transmit mode.
Window Size

45. 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?
To facilitate the entry and exit of data on media.
Is used by the server to resolve names.
A. show startup-config b. show running-config
Router

46. Which type of cable is most often associated w/ fiber-optic cable?
Rollover cable
A backbone cable.
Twisting of the cables
A. replace a switch w/ a router b. subnet the new networks

47. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Network Layer
A. performance degradation b. security issues c. host identification
Transport
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

48. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
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
Ctrl + Shift + 6
It provides for the exchange of data over a common local media.

49. Intermediary devices used to implement security between networks
80 (HTTP)
It provides for the exchange of data over a common local media.
A. goodput b. throughput c. bandwidth
A. router b. firewall

50. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
UTP
It uses support from the lower layers to distinguish between connections to the service.
A. netstat -r b. route PRINT