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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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. In a connectionless system - What is correct?
Rollover cable
A. DNS b. SMTP c. POP
Destination is not contacted before a packet is sent.
Is used by the server to resolve names.

2. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Resolve IPv4 addresses to MAC addresses.
The address of the router that the host will use to 'get to the other side'.
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
UTP

3. What is the primary purpose of Layer 4?
UTP
Identify processes or services that are communicating with end devices.
RJ-45
80 (HTTP)

4. What are 2 protocols for transfering web resources?
They must wait until the first hosts finish transfering the media.
A. HTTP b. HTTPS
8
The MAC protocol can be very simple.

5. What are 2 features of User Diagram Protocol (UDP)?
Physical
A. copper UTP b. optical fiber
A. low overhead b. connectionless
IP Protocol

6. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
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
Fiber
Switch

7. 2 characteristics of clients in data networks
It does not support encryption.
It reduces unnecessary broadcasts.
A. they initiate data exchanges b. they may upload data to servers
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

8. When do changes take effect in a Cisco router?
The magnetic field around the adjacent pairs of wire.
Network Layer
It provides for the exchange of data over a common local media.
As the commands are entered.

9. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
A. servers b. routers c. network printers
A. decentralized resources b. resource sharing w/o a dedicated server
2046
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

10. 3 terms that define the forms of help available within the Cisco IOS
A. DNS b. SMTP c. POP
Ctrl + Shift + 6
A. hot keys b. context-sensitive c. command syntax check
MAC

11. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Switch
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A random delay helps prevent the stations from experiencing another collision during transmission.
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

12. What can get you to an outside network?
UTP
The magnetic field around the adjacent pairs of wire.
A default gateway (router).
Console

13. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. application b. services
Rollover cable
Collisions can decrease network performance.

14. What do the intermediary devices in the network do?
A default gateway (router).
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. netstat -r b. route PRINT
A. decentralized resources b. resource sharing w/o a dedicated server

15. What are 3 properties of contention-based media access for a shared media?
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
Twisting of the cables
A. non-deterministic b. less overhead c. collisions exist
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

16. What is the purpose of resource records in DNS?
Application Layer
Is used by the server to resolve names.
A. Cat5 UTP b. Cat6 UTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

17. Which 2 options represent Layer 4 addressing?
Application Layer
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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

18. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. larger address space b. data types and classes of service c. authentication and encryption
The physical address is added.
IP Protocol
Hosts return to listen-before-transmit mode.

19. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. identifies the communicating applications b. identifies multiple conversations between the hosts
255.255.255.224

20. What is a component of a routing table entry?
The MAC protocol can be very simple.
Next-Hop Address
SSH
Destination Network Address

21. If you have a small network w/ 3 computers...
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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
MAC
Flash

22. Which device is used to create or divide broadcast domains?
Router
A backbone cable.
Any device whose backoff timer expires first.
Wireless

23. What are 2 common characteristics associated w/ dynamic routing protocols?
Network Layer
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. enable mode b. priviledge executive mode
The physical address is added.

24. 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
Is used by the server to resolve names.
Physical
It provides for the exchange of data over a common local media.

25. What are 3 pieces of info about a route contained in a routing table?
It has expanded adressing capabilities.
A. next-hop b. metric/interface c. destination network address
Router(config)# interface FastEthernet 0/1
It reduces unnecessary broadcasts.

26. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
The MAC protocol can be very simple.
A. media sharing b. logical topology
A. decentralized resources b. resource sharing w/o a dedicated server

27. What type of routing uses information that is manually entered into the routing table?
Is a layer of specific encapsulation.
A. DNS b. SMTP c. POP
FTP
Static

28. When is a straight-through cable used in a network?
When connecting a host to a switch.
UTP
A. HTTP b. HTTPS
The destination host address.

29. At which layer of the TCP/IP model does ethernet operate?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It does not support encryption.
The destination host address.
Network Access

30. When a network service fails - which port is most often used to access a router for management purposes?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Router(config)# hostname Costas
Console
Transport

31. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Ctrl + Shift + 6
TCP initializes the sequence numbers for the sessions.
Physical
172.16.192.160

32. How many bits make up an IPv4 address?
A. netstat -r b. route PRINT
A. HTTP b. HTTPS
When connecting a host to a switch.
32 bits

33. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Twisting of the cables
Resolve IPv4 addresses to MAC addresses.
The MAC protocol can be very simple.

34. Network Protocols
80 (HTTP)
It reduces unnecessary broadcasts.
It uses lasers as the light source.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

35. What is the primary reason for developing IPv6?
A default gateway (router).
It has expanded adressing capabilities.
Switch
A. flow control b. session establishment c. numbering and sequencing

36. 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?
Host A
A. decentralized resources b. resource sharing w/o a dedicated server
Flash
A. goodput b. throughput c. bandwidth

37. What do you need to use for an initial configuration on a Cisco router?
The physical address is added.
Resolve IPv4 addresses to MAC addresses.
It provides for the exchange of data over a common local media.
Console interface

38. 2 characteristics of peer-2-peer
IP is not properly installed
A. enable mode b. priviledge executive mode
A. decentralized resources b. resource sharing w/o a dedicated server
It uses lasers as the light source.

39. Which type of cable is most often associated w/ fiber-optic cable?
The destination host address.
Rollover cable
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 backbone cable.

40. What is the primary function of encapsulating packets into frames?
Collisions can decrease network performance.
Network Layer
To facilitate the entry and exit of data on media.
Originate data flow.

41. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The magnetic field around the adjacent pairs of wire.
A. router b. firewall
Router(config)# interface FastEthernet 0/1

42. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
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. router b. firewall
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

43. 3 statements of media acess control
Source and Destination Ports
Router
IP is not properly installed
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

44. 3 protocols that operate in the application layer
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. DNS b. SMTP c. POP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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

45. What is dinamically selected by the source host when forwarding data?
A backbone cable.
A. decentralized resources b. resource sharing w/o a dedicated server
Source Port
172.16.192.160

46. What is a default gateway address?

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47. What are 2 commands used to view a host routing table?
172.16.192.160
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It reduces unnecessary broadcasts.
A. netstat -r b. route PRINT

48. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
RJ-45
A. flow control b. session establishment c. numbering and sequencing
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

49. 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
A. flow control b. session establishment c. numbering and sequencing
Show Interfaces
A. replace a switch w/ a router b. subnet the new networks

50. What 2 type of cables would most commonly be used for new runs?
Binary ANDing
Minimal delays in data delivery.
A. Cat5 UTP b. Cat6 UTP
Network Layer

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CCNA - 2

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