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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. How does the application layer on a server process multiple client requests for services?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. performance degradation b. security issues c. host identification
A. larger address space b. data types and classes of service c. authentication and encryption
It uses support from the lower layers to distinguish between connections to the service.

2. What characteristic of an UTP helps reduce interference?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. flow control b. session establishment c. numbering and sequencing
Twisting of the cables
Switch

3. What are 2 forms of application layer software?
Twisting of the cables
Destination is not contacted before a packet is sent.
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. application b. services

4. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Signal loss can be experienced.
It reduces unnecessary broadcasts.
SMB

5. What type of network cable is used between a terminal and a console port?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. DB 60 b. Winchester 15-pin c. smart serial
It reduces unnecessary broadcasts.
Rollover cable

6. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
255.255.255.0
Window Size
A. performance degradation b. security issues c. host identification
UDP

7. 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?
Next-Hop Address
Router(config)# interface FastEthernet 0/1
The address of the router that the host will use to 'get to the other side'.
8

8. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
It provides for the exchange of data over a common local media.
Physical
Switch
A random delay helps prevent the stations from experiencing another collision during transmission.

9. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Host A
Router(config)# hostname Costas
To enable a receiving host to forward the data to the appropriate application.
Transport

10. 3 measures of data transfer
Time-to-live (TTL)
It has expanded adressing capabilities.
A. goodput b. throughput c. bandwidth
FTP

11. When destination network is not in the routing table - What are 2 actions the router might take?
Window Size
When connecting a host to a switch.
The packets will be delivered and reassembled at destination.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

12. What are key considering factors when grouping hosts into common networks?
A. DNS b. SMTP c. POP
Wireless
255.255.255.0
A. purpose b. geographic location c. ownership

13. Which layer supplies services and allows user interface?
Application Layer
Source and Destination Ports
2046
TCP initializes the sequence numbers for the sessions.

14. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
Host A
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Source and Destination Ports

15. 3 functions of the upper data link sublayer in the OSI model
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Static
Create signals that represent the bits in each frame for the media.

16. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. MTA b. SMTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling

17. Which device is used to create or divide broadcast domains?
A. performance degradation b. security issues c. host identification
Network portion
SMB
Router

18. What is a benefit of a WAN?
A. servers b. routers c. network printers
Host mobility
255.255.255.224
A. application b. services

19. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Is used by the server to resolve names.
A random delay helps prevent the stations from experiencing another collision during transmission.
Console interface
A. enable mode b. priviledge executive mode

20. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Network Layer Packet
Resolve IPv4 addresses to MAC addresses.
RJ-45

21. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Is a layer of specific encapsulation.
A. netstat -r b. route PRINT
Is used by the server to resolve names.
UDP

22. What command is used to change the default name to 'Costas'?
Identify processes or services that are communicating with end devices.
The destination host address.
The packets will be delivered and reassembled at destination.
Router(config)# hostname Costas

23. What is a component of a routing table entry?
Network
Next-Hop Address
UTP
A. flow control b. session establishment c. numbering and sequencing

24. 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
172.16.192.160
A. flow control b. session establishment c. numbering and sequencing
MAC

25. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Application Layer
A. addressing b. error detection c. frame delimiting
Logical Link Control sublayer

26. 3 terms that define the forms of help available within the Cisco IOS
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. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
Is used by the server to resolve names.
A. hot keys b. context-sensitive c. command syntax check

27. At which layer of the TCP/IP model does ethernet operate?
Network Access
It has expanded adressing capabilities.
Is a layer of specific encapsulation.
A random delay helps prevent the stations from experiencing another collision during transmission.

28. 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
Flash
A. replace a switch w/ a router b. subnet the new networks
32 bits

29. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
Any device whose backoff timer expires first.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
As the commands are entered.

30. Why are port numbers included in the TCP header of a segment?
A. goodput b. throughput c. bandwidth
To enable a receiving host to forward the data to the appropriate application.
2046
Physical

31. What method of signal transmission uses radio waves to carry signals?
Collisions can decrease network performance.
Wireless
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

32. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
255.255.255.0
A backbone cable.
Twisting of the cables

33. What kind of problems are caused by excessive broadcast traffic on network segments?
Source and Destination IP address
Ctrl + Shift + 6
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
DNS

34. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Host mobility
Network Layer Packet
Supports error detection.
80 (HTTP)

35. When do changes take effect in a Cisco router?
A. larger address space b. data types and classes of service c. authentication and encryption
Originate data flow.
As the commands are entered.
Destination Network Address

36. What layer encapsulates segments into packets?
To enable a receiving host to forward the data to the appropriate application.
A random delay helps prevent the stations from experiencing another collision during transmission.
Static
Network Layer

37. In business LANs - which connector is used w/ twisted-pair networking cable?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
RJ-45
Network Layer Packet
255.255.255.0

38. What is the purpose of the preamble in an ethernet frame?
Router
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Identify processes or services that are communicating with end devices.
Any device whose backoff timer expires first.

39. 3 features that allow TCP to realibly and accurately track the transmission of data
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. netstat -r b. route PRINT
A. flow control b. session establishment c. numbering and sequencing
A. show startup-config b. show running-config

40. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. DNS b. SMTP c. POP
To prevent the receiver from being overwhelmed by incoming data.
MAC

41. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
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. application b. presentation c. session d. transmision e. network f. data link g. physical
A. show startup-config b. show running-config
A. DNS b. SMTP c. POP

42. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. physical layer b. DLL layer
A. Cat5 UTP b. Cat6 UTP
Network address
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

43. What are 2 common characteristics associated w/ dynamic routing protocols?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. enable mode b. priviledge executive mode
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

44. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Physical
0 to 1023
Source and Destination IP address
The address of the router that the host will use to 'get to the other side'.

45. What is a drawback of the CSMA/CD access method?
A. minimizing of collisions b. division into broadcast domains
MAC
Collisions can decrease network performance.
IP is not properly installed

46. What is the primary reason for developing IPv6?
A. next-hop b. metric/interface c. destination network address
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It has expanded adressing capabilities.
Supports error detection.

47. What is a disadvantage of Telnet?
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
Rollover cable
It does not support encryption.
Flash

48. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. enable mode b. priviledge executive mode
To prevent the receiver from being overwhelmed by incoming data.
A. they initiate data exchanges b. they may upload data to servers

49. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Router(config)# hostname Costas
A. performance degradation b. security issues c. host identification
A. copper UTP b. optical fiber

50. What are 2 email components used to forward mail between servers?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network
A. MTA b. SMTP
Minimal delays in data delivery.