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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 is dinamically selected by the source host when forwarding data?
Source Port
Destination Network Address
Identify processes or services that are communicating with end devices.
A. Cat5 UTP b. Cat6 UTP

2. What are 2 email components used to forward mail between servers?
Logical Link Control sublayer
A. MTA b. SMTP
A. performance degradation b. security issues c. host identification
Rollover cable

3. 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
Flash
Create signals that represent the bits in each frame for the media.
It provides interface between applications on either end of the network.

4. What are 2 common characteristics associated w/ dynamic routing protocols?
Originate data flow.
It uses support from the lower layers to distinguish between connections to the service.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
OTDR

5. Which type of cable is most often associated w/ fiber-optic cable?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A backbone cable.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Hosts return to listen-before-transmit mode.

6. What is a default gateway address?

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7. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
Application Layer
A. MTA b. SMTP
32 bits

8. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. MTA b. SMTP
Network Layer Packet
A. not affected by EMI of RFI b. most expensive type of LAN cabling

9. 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. servers b. routers c. network printers
8
A. low overhead b. connectionless
Destination is not contacted before a packet is sent.

10. 3 measures of data transfer
8
A. goodput b. throughput c. bandwidth
A. copper UTP b. optical fiber
To prevent the receiver from being overwhelmed by incoming data.

11. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
A. Cat5 UTP b. Cat6 UTP
80 (HTTP)

12. What are 2 protocols for transfering web resources?
255.255.255.0
Create signals that represent the bits in each frame for the media.
A. HTTP b. HTTPS
A physical topology.

13. What characteristic of an UTP helps reduce interference?
Twisting of the cables
MAC
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
32 bits

14. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Destination Network Address
Transport
Physical

15. 3 properties of peer-2-peer applications
Application Layer
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
Next-Hop Address
Is used by the server to resolve names.

16. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
A. DB 60 b. Winchester 15-pin c. smart serial
A backbone cable.
As the commands are entered.

17. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
It has expanded adressing capabilities.
The magnetic field around the adjacent pairs of wire.
255.255.255.0
The destination host address.

18. 3 facts about the network portion of an IPv4 address
It uses lasers as the light source.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. MTA b. SMTP
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

19. Which combination of keys can be used to interrupt a ping or traceroute process?
Destination Network Address
A. perform degradation b. security issues c. host identification
A. servers b. routers c. network printers
Ctrl + Shift + 6

20. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Minimal delays in data delivery.
Hub
Rollover cable
Signal loss can be experienced.

21. 2 features that make switches preferable to hubs
TCP initializes the sequence numbers for the sessions.
255.255.255.224
A. minimizing of collisions b. division into broadcast domains
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

22. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
TCP initializes the sequence numbers for the sessions.
Host A

23. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
80 (HTTP)
Hosts return to listen-before-transmit mode.
Binary ANDing
Switch

24. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Originate data flow.
A random delay helps prevent the stations from experiencing another collision during transmission.
To enable a receiving host to forward the data to the appropriate application.
255.255.255.224

25. What do the intermediary devices in the network do?
Flash
Router(config)# interface FastEthernet 0/1
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Host mobility

26. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
Identify processes or services that are communicating with end devices.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
IP is not properly installed

27. Which layer supplies services and allows user interface?
A physical topology.
A. physical layer b. DLL layer
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Application Layer

28. What statements describe the logical token-passing topology?
Is used by the server to resolve names.
Hosts return to listen-before-transmit mode.
The MAC protocol can be very simple.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

29. What is the primary reason for developing IPv6?
Router
Wireless
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It has expanded adressing capabilities.

30. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Signal loss can be experienced.
Originate data flow.
MAC
Binary ANDing

31. Which 2 options represent Layer 4 addressing?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. servers b. routers c. network printers
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. identifies the communicating applications b. identifies multiple conversations between the hosts

32. Which device is used to create or divide broadcast domains?
Router
They must wait until the first hosts finish transfering the media.
Binary ANDing
Rollover cable

33. What makes fiber preferable to copper for interconnecting buildings?
The MAC protocol can be very simple.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

34. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
Identify processes or services that are communicating with end devices.
It provides interface between applications on either end of the network.
A. addressing b. error detection c. frame delimiting

35. What can be a problem that is reduced by adding end-to-end addressing?
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
It reduces unnecessary broadcasts.
A. show startup-config b. show running-config
A. router b. firewall

36. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Application Layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Any device whose backoff timer expires first.
Static

37. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router(config)# hostname Costas
Source and Destination Ports
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

38. What are key considering factors when grouping hosts into common networks?
Destination is not contacted before a packet is sent.
A. purpose b. geographic location c. ownership
The magnetic field around the adjacent pairs of wire.
It reduces unnecessary broadcasts.

39. What is PDU?
Physical
A. physical layer b. DLL layer
SSH
Is a layer of specific encapsulation.

40. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. low overhead b. connectionless
Logical Link Control sublayer
A. performance degradation b. security issues c. host identification

41. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
Identify processes or services that are communicating with end devices.
A. low overhead b. connectionless
They must wait until the first hosts finish transfering the media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

42. What is an effect of improperly applying a network cable connector?
It reduces unnecessary broadcasts.
Signal loss can be experienced.
A. show startup-config b. show running-config
A. purpose b. geographic location c. ownership

43. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Show Interfaces
It uses lasers as the light source.
A. enable mode b. priviledge executive mode
A. they initiate data exchanges b. they may upload data to servers

44. If you have a small network w/ 3 computers...
A. the router will discard the packet b. the router will send a time exceeded message to the source host
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
Console
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

45. Which portion of the network layer address does a router use to forward packets?
A backbone cable.
A default gateway (router).
Network portion
A. perform degradation b. security issues c. host identification

46. Why is flow control used for TCP data transfer?
A. hot keys b. context-sensitive c. command syntax check
A. not affected by EMI of RFI b. most expensive type of LAN cabling
To prevent the receiver from being overwhelmed by incoming data.
A. decentralized resources b. resource sharing w/o a dedicated server

47. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
OTDR
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. DNS b. SMTP c. POP
A. DB 60 b. Winchester 15-pin c. smart serial

48. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
UDP
A. copper UTP b. optical fiber

49. What is the role of the OSI Application Layer?
Any device whose backoff timer expires first.
It provides interface between applications on either end of the network.
Router
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

50. During a TCP session - if packets arrive out of order - what will happen?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The magnetic field around the adjacent pairs of wire.
The packets will be delivered and reassembled at destination.