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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. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. DNS b. SMTP c. POP
Show Interfaces
The packets will be delivered and reassembled at destination.

2. What is the primary purpose of Layer 4?
A. purpose b. geographic location c. ownership
Host A
Identify processes or services that are communicating with end devices.
It uses lasers as the light source.

3. What is the function of the DLL?
It provides for the exchange of data over a common local media.
A. addressing b. error detection c. frame delimiting
Source Port
Next-Hop Address

4. What correctly describes a MAC address?
A. enable mode b. priviledge executive mode
Any device whose backoff timer expires first.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

5. 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
The magnetic field around the adjacent pairs of wire.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Transport

6. What is a benefit of a WAN?
Host mobility
A. hot keys b. context-sensitive c. command syntax check
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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

7. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Create signals that represent the bits in each frame for the media.
A. non-deterministic b. less overhead c. collisions exist
255.255.255.224

8. An admin needs to keep contents private - which access method should he use?
SSH
A. MTA b. SMTP
A. they initiate data exchanges b. they may upload data to servers
TCP initializes the sequence numbers for the sessions.

9. What is the purpose of a default gateway?
A. router b. firewall
Identify the device that allows local network computers to communicate w/ devices in other networks.
RJ-45
TCP initializes the sequence numbers for the sessions.

10. Which IP packet field will prevent endless loops?
Host A
A. media sharing b. logical topology
Physical
Time-to-live (TTL)

11. 3 statements about the role of routers in the network
SSH
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.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

12. What do end devices do?
Originate data flow.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
It provides for the exchange of data over a common local media.
Source and Destination Ports

13. 3 measures of data transfer
Window Size
A. low overhead b. connectionless
UDP
A. goodput b. throughput c. bandwidth

14. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Hub
80 (HTTP)
A. physical layer b. DLL layer

15. 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?
Rollover cable
Supports error detection.
A. Cat5 UTP b. Cat6 UTP
Host A

16. What method of signal transmission uses radio waves to carry signals?
Wireless
Identify processes or services that are communicating with end devices.
Network portion
It does not support encryption.

17. What is the primary reason for developing IPv6?
A. decentralized resources b. resource sharing w/o a dedicated server
A. physical layer b. DLL layer
It has expanded adressing capabilities.
Static

18. 3 characteristics of valid Ethernet Layer 2 addresses
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
8
Application Layer

19. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Console interface
Hub
Network address
It uses lasers as the light source.

20. What makes fiber preferable to copper for interconnecting buildings?
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
A. perform degradation b. security issues c. host identification
A. minimizing of collisions b. division into broadcast domains
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

21. During a TCP session - if packets arrive out of order - what will happen?
It does not support encryption.
The packets will be delivered and reassembled at destination.
Router
Destination Network Address

22. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
Is a layer of specific encapsulation.
Network Layer Packet
Hub

23. What kind of problems are caused by excessive broadcast traffic on network segments?
Network Layer Packet
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. replace a switch w/ a router b. subnet the new networks
8

24. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
When connecting a host to a switch.
No collisions will occur on this link.
Destination Network Address

25. What are 2 common characteristics associated w/ dynamic routing protocols?
Twisting of the cables
Source and Destination Ports
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. physical layer b. DLL layer

26. There are too many broadcasts on switches - what can be done?
A. netstat -r b. route PRINT
A. replace a switch w/ a router b. subnet the new networks
172.16.192.160
UDP

27. Which type of cable is most often associated w/ fiber-optic cable?
SMB
DNS
Router(config)# hostname Costas
A backbone cable.

28. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
The destination host address.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
UTP

29. What is the role of MTA in handling email?
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
Router
Router(config)# interface FastEthernet 0/1
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

30. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
SMB
Application Layer
A. DNS b. SMTP c. POP

31. 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?
A. Cat5 UTP b. Cat6 UTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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. show startup-config b. show running-config

32. What do you need to use for an initial configuration on a Cisco router?
The destination host address.
172.16.192.160
Source and Destination Ports
Console interface

33. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
A. purpose b. geographic location c. ownership
It provides for the exchange of data over a common local media.
SSH

34. What are key considering factors when grouping hosts into common networks?
To facilitate the entry and exit of data on media.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. purpose b. geographic location c. ownership

35. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Network Access
Rollover cable
Transport

36. What is a disadvantage of Telnet?
Identify processes or services that are communicating with end devices.
When connecting a host to a switch.
It does not support encryption.
The physical address is added.

37. What event occurs during the 3-way handshake?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
TCP initializes the sequence numbers for the sessions.
Network Access
80 (HTTP)

38. 3 properties of peer-2-peer applications
Rollover cable
DNS
It provides interface between applications on either end of the network.
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

39. What information is added during encapsulation at OSI Layer 3?
Originate data flow.
Source and Destination IP address
Network portion
Time-to-live (TTL)

40. What is an automated service that matches resource names w/ required IP addresses?
Console interface
OTDR
A. Physical b. Data Link
DNS

41. What is a characteristic of a single-mode fiber-optic cable?
UDP
It uses lasers as the light source.
It provides for the exchange of data over a common local media.
Console

42. What are 2 protocols for transfering web resources?
2046
To prevent the receiver from being overwhelmed by incoming data.
Network portion
A. HTTP b. HTTPS

43. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Source and Destination IP address
Network portion
Router(config)# interface FastEthernet 0/1

44. What does the IEEE 802.2 standard represent in Ethernet technologies?
Router
Logical Link Control sublayer
Is a layer of specific encapsulation.
Rollover cable

45. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
2046
Source Port
It has expanded adressing capabilities.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

46. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The address of the router that the host will use to 'get to the other side'.
A. MTA b. SMTP

47. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
SMB
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
Switch

48. What info is found in the TCP and UDP header info?
The destination host address.
OTDR
Source and Destination Ports
A. replace a switch w/ a router b. subnet the new networks

49. If you have a full-duplex operational network - what can happen?
Supports error detection.
No collisions will occur on this link.
FTP
A. non-deterministic b. less overhead c. collisions exist

50. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
It does not support encryption.
Fiber
A. minimizing of collisions b. division into broadcast domains
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential