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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. When a device is moved from one network to the other...?
A. netstat -r b. route PRINT
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. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. Cat5 UTP b. Cat6 UTP

2. What are 2 common characteristics associated w/ dynamic routing protocols?
A. minimizing of collisions b. division into broadcast domains
Fiber
Signal loss can be experienced.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

3. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
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
To prevent the receiver from being overwhelmed by incoming data.
Supports error detection.
A. Physical b. Data Link

4. What kind of problems are caused by excessive broadcast traffic on network segments?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
To prevent the receiver from being overwhelmed by incoming data.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. addressing b. error detection c. frame delimiting

5. What 2 type of cables would most commonly be used for new runs?
Application Layer
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. Cat5 UTP b. Cat6 UTP

6. To make a console connection from a comp to a Cisco router - what cable should be used?
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
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
Static

7. Which layer supplies services and allows user interface?
To enable a receiving host to forward the data to the appropriate application.
It uses support from the lower layers to distinguish between connections to the service.
Application Layer
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

8. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Hub
Supports error detection.
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
OTDR

9. Which combination of keys can be used to interrupt a ping or traceroute process?
As the commands are entered.
Ctrl + Shift + 6
TCP initializes the sequence numbers for the sessions.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

10. What is a disadvantage of Telnet?
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
OTDR
It does not support encryption.
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 is an automated service that matches resource names w/ required IP addresses?
172.16.192.160
Ctrl + Shift + 6
DNS
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

12. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
It does not support encryption.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A random delay helps prevent the stations from experiencing another collision during transmission.
Hosts return to listen-before-transmit mode.

13. What is the primary purpose of Layer 4?
32 bits
Identify processes or services that are communicating with end devices.
Switch
Wireless

14. After an ethernet collision - which device has priority to transmit data?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
No collisions will occur on this link.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Any device whose backoff timer expires first.

15. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
Is a layer of specific encapsulation.
Source and Destination IP address
To enable a receiving host to forward the data to the appropriate application.

16. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Network Layer Packet
255.255.255.0
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
When connecting a host to a switch.

17. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host mobility
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. DB 60 b. Winchester 15-pin c. smart serial

18. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. larger address space b. data types and classes of service c. authentication and encryption
A. application b. services
The magnetic field around the adjacent pairs of wire.

19. What is dinamically selected by the source host when forwarding data?
It provides interface between applications on either end of the network.
Source Port
Collisions can decrease network performance.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

20. What application layer protocol is used to support file transfers between client and server?
A. hot keys b. context-sensitive c. command syntax check
Source Port
To enable a receiving host to forward the data to the appropriate application.
FTP

21. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
DNS
It uses lasers as the light source.
Hosts return to listen-before-transmit mode.

22. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. minimizing of collisions b. division into broadcast domains
Binary ANDing
It uses support from the lower layers to distinguish between connections to the service.

23. What is an effect of improperly applying a network cable connector?
The address of the router that the host will use to 'get to the other side'.
Signal loss can be experienced.
A. they initiate data exchanges b. they may upload data to servers
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

24. Default Gateway is incorrect on the host - What is the impact on the communications?
Application Layer
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.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

25. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Fiber
A. DB 60 b. Winchester 15-pin c. smart serial
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

26. 2 most commonly used media types in ethernet networks
Network
A. Physical b. Data Link
A. Cat5 UTP b. Cat6 UTP
A. copper UTP b. optical fiber

27. Which characteristics describe fiber optic cable?
A physical topology.
2046
Next-Hop Address
A. not affected by EMI of RFI b. most expensive type of LAN cabling

28. What is a characteristic of a single-mode fiber-optic cable?
Source and Destination Ports
It uses lasers as the light source.
A. next-hop b. metric/interface c. destination network address
Is used by the server to resolve names.

29. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
Destination is not contacted before a packet is sent.
Originate data flow.
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

30. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. goodput b. throughput c. bandwidth
A. router b. firewall
A. media sharing b. logical topology

31. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. flow control b. session establishment c. numbering and sequencing
Router
UTP
Twisting of the cables

32. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. physical layer b. DLL layer
A. media sharing b. logical topology
The destination host address.

33. At which layers of the OSI model does ethernet operate?
The packets will be delivered and reassembled at destination.
A. servers b. routers c. network printers
A. physical layer b. DLL layer
A. performance degradation b. security issues c. host identification

34. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. addressing b. error detection c. frame delimiting
RJ-45
Next-Hop Address
Destination Network Address

35. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
To facilitate the entry and exit of data on media.
8
A. DB 60 b. Winchester 15-pin c. smart serial

36. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Rollover cable
A. Cat5 UTP b. Cat6 UTP
Transport
A. addressing b. error detection c. frame delimiting

37. 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
Next-Hop Address
Network portion
No collisions will occur on this link.

38. Which portion of the network layer address does a router use to forward packets?
Network portion
Source Port
Is used by the server to resolve names.
32 bits

39. During a TCP session - if packets arrive out of order - what will happen?
32 bits
The packets will be delivered and reassembled at destination.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. media sharing b. logical topology

40. 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.
They must wait until the first hosts finish transfering the media.
Wireless
Twisting of the cables

41. 2 features that make switches preferable to hubs
Hosts return to listen-before-transmit mode.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Destination Network Address
A. minimizing of collisions b. division into broadcast domains

42. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
0 to 1023
UDP
A. next-hop b. metric/interface c. destination network address

43. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
The physical address is added.
Switch
A. DNS b. SMTP c. POP
IP is not properly installed

44. 3 statements of media acess control
It provides interface between applications on either end of the network.
IP is not properly installed
Flash
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

45. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. router b. firewall
A backbone cable.
A. DB 60 b. Winchester 15-pin c. smart serial

46. 3 features that allow TCP to realibly and accurately track the transmission of data
The destination host address.
A. flow control b. session establishment c. numbering and sequencing
A. Cat5 UTP b. Cat6 UTP
A random delay helps prevent the stations from experiencing another collision during transmission.

47. 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. show startup-config b. show running-config
A. media sharing b. logical topology
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

48. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
They must wait until the first hosts finish transfering the media.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UTP

49. If you have a small network w/ 3 computers...
When connecting a host to a switch.
Transport
A. minimizing of collisions b. division into broadcast domains
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

50. 2 characteristics of peer-2-peer
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. decentralized resources b. resource sharing w/o a dedicated server
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Hub