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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 statements of media acess control
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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Host mobility
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

2. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The magnetic field around the adjacent pairs of wire.
Network address
Hub

3. Which device is used to create or divide broadcast domains?
Router
MAC
A. application b. services
A. next-hop b. metric/interface c. destination network address

4. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. goodput b. throughput c. bandwidth
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
To facilitate the entry and exit of data on media.
A. purpose b. geographic location c. ownership

5. What is the function of the DLL?
A. media sharing b. logical topology
A. application b. services
Originate data flow.
It provides for the exchange of data over a common local media.

6. What layer encapsulates segments into packets?
A. application b. services
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Network Layer
Network address

7. Which layer supplies services and allows user interface?
Application Layer
When connecting a host to a switch.
The packets will be delivered and reassembled at destination.
Destination Network Address

8. Why are port numbers included in the TCP header of a segment?
A. DB 60 b. Winchester 15-pin c. smart serial
To enable a receiving host to forward the data to the appropriate application.
Console
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

9. What is PDU?
Is a layer of specific encapsulation.
Network Layer Packet
A. decentralized resources b. resource sharing w/o a dedicated server
It provides interface between applications on either end of the network.

10. In a connectionless system - What is correct?
Network
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. DNS b. SMTP c. POP
Destination is not contacted before a packet is sent.

11. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Console interface
Network portion
Router
MAC

12. What makes fiber preferable to copper for interconnecting buildings?
The address of the router that the host will use to 'get to the other side'.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Hosts return to listen-before-transmit mode.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

13. How does the application layer on a server process multiple client requests for services?
The physical address is added.
The packets will be delivered and reassembled at destination.
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# hostname Costas

14. What are 3 properties of contention-based media access for a shared media?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. non-deterministic b. less overhead c. collisions exist
Create signals that represent the bits in each frame for the media.
When connecting a host to a switch.

15. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. purpose b. geographic location c. ownership
A. media sharing b. logical topology
SMB

16. What are 2 forms of application layer software?
A. application b. services
The address of the router that the host will use to 'get to the other side'.
A. low overhead b. connectionless
A. replace a switch w/ a router b. subnet the new networks

17. Why is flow control used for TCP data transfer?
Router(config)# interface FastEthernet 0/1
To prevent the receiver from being overwhelmed by incoming data.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
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

18. What is a protocol that provides connectionless network layer services?
32 bits
Window Size
IP Protocol
Static

19. What is a default gateway address?

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20. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
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 physical topology.
Rollover cable

21. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. router b. firewall
SSH
A. minimizing of collisions b. division into broadcast domains
Fiber

22. 3 measures of data transfer
Hub
Transport
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. goodput b. throughput c. bandwidth

23. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A default gateway (router).
A. non-deterministic b. less overhead c. collisions exist
The address of the router that the host will use to 'get to the other side'.

24. 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?
Host mobility
A. Cat5 UTP b. Cat6 UTP
No collisions will occur on this link.
172.16.192.160

25. What is a drawback of the CSMA/CD access method?
A. MTA b. SMTP
No collisions will occur on this link.
Network
Collisions can decrease network performance.

26. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
0 to 1023
Is a layer of specific encapsulation.

27. What is an effect of improperly applying a network cable connector?
To prevent the receiver from being overwhelmed by incoming data.
As the commands are entered.
It uses support from the lower layers to distinguish between connections to the service.
Signal loss can be experienced.

28. At which layers of the OSI model does ethernet operate?
DNS
A. physical layer b. DLL layer
Resolve IPv4 addresses to MAC addresses.
A. enable mode b. priviledge executive mode

29. What method of signal transmission uses radio waves to carry signals?
A. larger address space b. data types and classes of service c. authentication and encryption
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
Wireless
8

30. What info is found in the TCP and UDP header info?
RJ-45
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
Source and Destination Ports
A. enable mode b. priviledge executive mode

31. When a network service fails - which port is most often used to access a router for management purposes?
A. copper UTP b. optical fiber
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
Console
A. Cat5 UTP b. Cat6 UTP

32. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
It provides for the exchange of data over a common local media.
Originate data flow.
A. physical layer b. DLL layer

33. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
The destination host address.
A. DB 60 b. Winchester 15-pin c. smart serial
It provides interface between applications on either end of the network.

34. What is an automated service that matches resource names w/ required IP addresses?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. purpose b. geographic location c. ownership
A. performance degradation b. security issues c. host identification
DNS

35. What is the primary purpose of ARP?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Resolve IPv4 addresses to MAC addresses.
80 (HTTP)
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

36. What is a disadvantage of Telnet?
A. it has centralized administration b. security is easier to enforce
It does not support encryption.
As the commands are entered.
The destination host address.

37. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Time-to-live (TTL)
A. larger address space b. data types and classes of service c. authentication and encryption
Transport
Rollover cable

38. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
Resolve IPv4 addresses to MAC addresses.
2046
TCP initializes the sequence numbers for the sessions.

39. 3 primary functions of the data link layer encapsulation
As the commands are entered.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they initiate data exchanges b. they may upload data to servers
A. addressing b. error detection c. frame delimiting

40. What command can be used to determine if the router has experienced any input or output errors?
Physical
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. purpose b. geographic location c. ownership
Show Interfaces

41. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
0 to 1023
Binary ANDing
TCP initializes the sequence numbers for the sessions.
Router(config)# hostname Costas

42. What information is added during encapsulation at OSI Layer 3?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. low overhead b. connectionless
It reduces unnecessary broadcasts.
Source and Destination IP address

43. Which combination of keys can be used to interrupt a ping or traceroute process?
The address of the router that the host will use to 'get to the other side'.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
When connecting a host to a switch.
Ctrl + Shift + 6

44. 2 features that make switches preferable to hubs
Network portion
SMB
A. minimizing of collisions b. division into broadcast domains
Flash

45. What causes crosstalk within cable pairs when using UTP?
OTDR
The magnetic field around the adjacent pairs of wire.
Console
Time-to-live (TTL)

46. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
OTDR
Destination is not contacted before a packet is sent.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

47. 3 properties of peer-2-peer applications
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
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. Cat5 UTP b. Cat6 UTP
MAC

48. What kind of problems are caused by excessive broadcast traffic on network segments?
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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Application Layer
Create signals that represent the bits in each frame for the media.

49. During a TCP session - if packets arrive out of order - what will happen?
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
Identify processes or services that are communicating with end devices.
Destination Network Address
The packets will be delivered and reassembled at destination.

50. What does the IEEE 802.2 standard represent in Ethernet technologies?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Identify processes or services that are communicating with end devices.
Logical Link Control sublayer
Source Port