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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. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Static
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Supports error detection.
A. Cat5 UTP b. Cat6 UTP

2. What is the purpose of resource records in DNS?
IP is not properly installed
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Is used by the server to resolve names.
A. it has centralized administration b. security is easier to enforce

3. How many bits make up an IPv4 address?
32 bits
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
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. minimizing of collisions b. division into broadcast domains

4. Which layer supplies services and allows user interface?
Application Layer
It has expanded adressing capabilities.
A. DNS b. SMTP c. POP
A. HTTP b. HTTPS

5. 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
Hosts return to listen-before-transmit mode.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

6. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. router b. firewall
Logical Link Control sublayer
Time-to-live (TTL)

7. Where is the IOS file stored at?
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
Fiber
80 (HTTP)

8. What command can be used to determine if the router has experienced any input or output errors?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Show Interfaces
UTP
A. DB 60 b. Winchester 15-pin c. smart serial

9. When is a straight-through cable used in a network?
When connecting a host to a switch.
Source and Destination Ports
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

10. What describes the purpose of default route?
Console interface
A. replace a switch w/ a router b. subnet the new networks
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Identify processes or services that are communicating with end devices.

11. Default Gateway is incorrect on the host - What is the impact on the communications?
Time-to-live (TTL)
Network
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

12. What event occurs during the 3-way handshake?
Resolve IPv4 addresses to MAC addresses.
They must wait until the first hosts finish transfering the media.
Show Interfaces
TCP initializes the sequence numbers for the sessions.

13. What are key considering factors when grouping hosts into common networks?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Next-Hop Address
A. purpose b. geographic location c. ownership
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

14. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. router b. firewall
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. addressing b. error detection c. frame delimiting
255.255.255.224

15. What command is used to change the default name to 'Costas'?
Network address
Router(config)# hostname Costas
8
A. servers b. routers c. network printers

16. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. purpose b. geographic location c. ownership
A. MTA b. SMTP
A. DNS b. SMTP c. POP

17. 2 functions of encapsulation
A. minimizing of collisions b. division into broadcast domains
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
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
SMB

18. 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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Rollover cable
They must wait until the first hosts finish transfering the media.

19. statements of IP adressing
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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
Source Port
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

20. What device can check for faults - integrity and performance of media?
It uses lasers as the light source.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
OTDR
A. netstat -r b. route PRINT

21. What application layer protocol is used to support file transfers between client and server?
The destination host address.
Next-Hop Address
To facilitate the entry and exit of data on media.
FTP

22. What is an automated service that matches resource names w/ required IP addresses?
A. media sharing b. logical topology
A. addressing b. error detection c. frame delimiting
RJ-45
DNS

23. What makes fiber preferable to copper for interconnecting buildings?
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
Resolve IPv4 addresses to MAC addresses.
8

24. What are 2 commands used to view a host routing table?
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
Fiber
A. netstat -r b. route PRINT
Identify the device that allows local network computers to communicate w/ devices in other networks.

25. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
SSH
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Create signals that represent the bits in each frame for the media.

26. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. purpose b. geographic location c. ownership
Signal loss can be experienced.

27. What is the primary function of encapsulating packets into frames?
It provides for the exchange of data over a common local media.
To facilitate the entry and exit of data on media.
Physical
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

28. If you have a small network w/ 3 computers...
Console
Logical Link Control sublayer
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
255.255.255.224

29. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
2046
255.255.255.224
Fiber
Source Port

30. At which layer of the TCP/IP model does ethernet operate?
The address of the router that the host will use to 'get to the other side'.
Network Access
Network Layer
A. application b. presentation c. session d. transmision e. network f. data link g. physical

31. What is the purpose of the TCP/IP Network Application Layer?
They must wait until the first hosts finish transfering the media.
A. media sharing b. logical topology
Network Media Control
Router(config)# hostname Costas

32. Which device is used to create or divide broadcast domains?
Destination is not contacted before a packet is sent.
Router
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Destination Network Address

33. What information is added during encapsulation at OSI Layer 3?
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 IP address
The address of the router that the host will use to 'get to the other side'.
Network Media Control

34. What is a benefit of a WAN?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Flash
Is used by the server to resolve names.
Host mobility

35. 3 features that allow TCP to realibly and accurately track the transmission of data
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Is a layer of specific encapsulation.
Application Layer
A. flow control b. session establishment c. numbering and sequencing

36. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. performance degradation b. security issues c. host identification
Supports error detection.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. Physical b. Data Link

37. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. minimizing of collisions b. division into broadcast domains
MAC
Network Layer Packet
A. enable mode b. priviledge executive mode

38. What are 2 protocols for transfering web resources?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. HTTP b. HTTPS
UDP
Hub

39. When a device is moved from one network to the other...?
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
As the commands are entered.
Source Port
0 to 1023

40. 2 features that make switches preferable to hubs
No collisions will occur on this link.
A. minimizing of collisions b. division into broadcast domains
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Show Interfaces

41. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Is a layer of specific encapsulation.
Transport
80 (HTTP)
As the commands are entered.

42. In business LANs - which connector is used w/ twisted-pair networking cable?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. physical layer b. DLL layer
RJ-45

43. How does the application layer on a server process multiple client requests for services?
Static
A. non-deterministic b. less overhead c. collisions exist
Console interface
It uses support from the lower layers to distinguish between connections to the service.

44. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
FTP
Rollover cable
Host A
255.255.255.0

45. 3 statements about routes and their use
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
0 to 1023
It provides for the exchange of data over a common local media.
Console interface

46. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
The MAC protocol can be very simple.
Network Layer Packet
Static
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

47. What can get you to an outside network?
Originate data flow.
A backbone cable.
A. DNS b. SMTP c. POP
A default gateway (router).

48. When a network service fails - which port is most often used to access a router for management purposes?
Console
Twisting of the cables
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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

49. What is the purpose of the preamble in an ethernet frame?
Hosts return to listen-before-transmit mode.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Create signals that represent the bits in each frame for the media.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

50. Which 2 options represent Layer 4 addressing?
255.255.255.0
Signal loss can be experienced.
Router(config)# hostname Costas
A. identifies the communicating applications b. identifies multiple conversations between the hosts