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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. What makes fiber preferable to copper for interconnecting buildings?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
32 bits
IP is not properly installed

2. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
As the commands are entered.
Is a layer of specific encapsulation.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

3. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
Destination is not contacted before a packet is sent.
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
Network Media Control

4. What device can check for faults - integrity and performance of media?
Physical
Ctrl + Shift + 6
OTDR
32 bits

5. 3 functions of the upper data link sublayer in the OSI model
Rollover cable
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. router b. firewall
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

6. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Source and Destination IP address
A random delay helps prevent the stations from experiencing another collision during transmission.
MAC
UDP

7. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It uses lasers as the light source.
Supports error detection.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Rollover cable

8. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Create signals that represent the bits in each frame for the media.
80 (HTTP)
A. DB 60 b. Winchester 15-pin c. smart serial
A. purpose b. geographic location c. ownership

9. If you have a full-duplex operational network - what can happen?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. replace a switch w/ a router b. subnet the new networks
No collisions will occur on this link.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

10. What determines the method of media access control?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
They must wait until the first hosts finish transfering the media.
Supports error detection.
A. media sharing b. logical topology

11. 2 characteristics of clients in data networks
Minimal delays in data delivery.
A. they initiate data exchanges b. they may upload data to servers
255.255.255.0
A. netstat -r b. route PRINT

12. What is the purpose of resource records in DNS?
Originate data flow.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Is used by the server to resolve names.
Source Port

13. 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?
A. copper UTP b. optical fiber
Supports error detection.
Minimal delays in data delivery.
Host A

14. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Is used by the server to resolve names.
Network address
Router
Is a layer of specific encapsulation.

15. During a TCP session - if packets arrive out of order - what will happen?
A. MTA b. SMTP
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
The packets will be delivered and reassembled at destination.
A. show startup-config b. show running-config

16. 2 characteristics of peer-2-peer
They must wait until the first hosts finish transfering the media.
SSH
A. replace a switch w/ a router b. subnet the new networks
A. decentralized resources b. resource sharing w/o a dedicated server

17. Which type of cable is most often associated w/ fiber-optic cable?
A. minimizing of collisions b. division into broadcast domains
A backbone cable.
When connecting a host to a switch.
Console

18. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network address
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

19. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. netstat -r b. route PRINT
Binary ANDing
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

20. What is an effect of improperly applying a network cable connector?
A. performance degradation b. security issues c. host identification
Signal loss can be experienced.
Source and Destination IP address
Network portion

21. What is the purpose of a default gateway?
Show Interfaces
Identify the device that allows local network computers to communicate w/ devices in other networks.
Router(config)# hostname Costas
A. enable mode b. priviledge executive mode

22. 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
Network Layer Packet
It uses support from the lower layers to distinguish between connections to the service.
A. Cat5 UTP b. Cat6 UTP

23. 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?
IP is not properly installed
80 (HTTP)
A. enable mode b. priviledge executive mode
A. show startup-config b. show running-config

24. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
UDP
A physical topology.
Network Layer Packet
A. replace a switch w/ a router b. subnet the new networks

25. Which 2 options represent Layer 4 addressing?
Destination is not contacted before a packet is sent.
Rollover cable
A. show startup-config b. show running-config
A. identifies the communicating applications b. identifies multiple conversations between the hosts

26. 3 factors that should be considered when implementing Layer 2 protocols
Network Media Control
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
Transport
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

27. Which portion of the network layer address does a router use to forward packets?
Console
They must wait until the first hosts finish transfering the media.
A. DB 60 b. Winchester 15-pin c. smart serial
Network portion

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

29. Statements that describe LAN
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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
DNS

30. What kind of problems are caused by excessive broadcast traffic on network segments?
IP is not properly installed
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Transport
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

31. What can get you to an outside network?
A default gateway (router).
RJ-45
SSH
255.255.255.224

32. 3 facts about the network portion of an IPv4 address
Switch
It provides interface between applications on either end of the network.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
IP Protocol

33. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
Wireless
Source Port
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

34. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Hosts return to listen-before-transmit mode.
Is used by the server to resolve names.
Logical Link Control sublayer

35. What is PDU?
Ctrl + Shift + 6
Transport
Is a layer of specific encapsulation.
It provides for the exchange of data over a common local media.

36. 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.
Create signals that represent the bits in each frame for the media.
Binary ANDing
RJ-45

37. Which layer supplies services and allows user interface?
A. DNS b. SMTP c. POP
8
Application Layer
255.255.255.224

38. Which characteristics describe fiber optic cable?
Twisting of the cables
The destination host address.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. hot keys b. context-sensitive c. command syntax check

39. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
IP Protocol
A. MTA b. SMTP
It uses lasers as the light source.

40. Group of hosts that have identical bit patterns in the high order bits of their addresses
32 bits
SMB
A. next-hop b. metric/interface c. destination network address
Network

41. What application layer protocol is used to support file transfers between client and server?
FTP
Network Media Control
It provides interface between applications on either end of the network.
A. it has centralized administration b. security is easier to enforce

42. 3 features of IPv6
Network Media Control
A. larger address space b. data types and classes of service c. authentication and encryption
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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

43. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. application b. services
Logical Link Control sublayer
A. netstat -r b. route PRINT
A. DB 60 b. Winchester 15-pin c. smart serial

44. What are 3 common problems w/ large networks?
The MAC protocol can be very simple.
Network
A. perform degradation b. security issues c. host identification
Destination Network Address

45. 3 statements about routes and their use
A. addressing b. error detection c. frame delimiting
A. servers b. routers c. network printers
Transport
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

46. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Network Layer
Window Size
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

47. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Destination Network Address
UTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

48. What 2 type of cables would most commonly be used for new runs?
Source and Destination IP address
A. Cat5 UTP b. Cat6 UTP
A. minimizing of collisions b. division into broadcast domains
A. Physical b. Data Link

49. What is the primary rope of the physical layer in transmitting data?
A backbone cable.
Create signals that represent the bits in each frame for the media.
UTP
Network Access

50. What are 2 forms of application layer software?
A. router b. firewall
The address of the router that the host will use to 'get to the other side'.
A. application b. services
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery