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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 a disadvantage of Telnet?
2046
It does not support encryption.
It provides interface between applications on either end of the network.
Source Port

2. When destination network is not in the routing table - What are 2 actions the router might take?
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
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Show Interfaces
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

3. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
Network
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. it has centralized administration b. security is easier to enforce

4. What is a protocol that provides connectionless network layer services?
Show Interfaces
A. purpose b. geographic location c. ownership
IP is not properly installed
IP Protocol

5. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Minimal delays in data delivery.
IP Protocol
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Router

6. What do end devices do?
MAC
Router(config)# interface FastEthernet 0/1
The magnetic field around the adjacent pairs of wire.
Originate data flow.

7. What are 2 email components used to forward mail between servers?
Binary ANDing
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. replace a switch w/ a router b. subnet the new networks
A. MTA b. SMTP

8. 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
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. servers b. routers c. network printers

9. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. addressing b. error detection c. frame delimiting
UTP
A default gateway (router).
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

10. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A random delay helps prevent the stations from experiencing another collision during transmission.
SMB

11. What are 2 common characteristics associated w/ dynamic routing protocols?
A. next-hop b. metric/interface c. destination network address
UTP
The packets will be delivered and reassembled at destination.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

12. What application layer protocol is used to support file transfers between client and server?
The magnetic field around the adjacent pairs of wire.
It uses lasers as the light source.
FTP
Router(config)# hostname Costas

13. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
It does not support encryption.
A. physical layer b. DLL layer
A. DB 60 b. Winchester 15-pin c. smart serial
Network Layer Packet

14. What type of routing uses information that is manually entered into the routing table?
Static
A. MTA b. SMTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Logical Link Control sublayer

15. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
Twisting of the cables
A. non-deterministic b. less overhead c. collisions exist
Fiber

16. What are 2 commands used to view a host routing table?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. netstat -r b. route PRINT
A. they initiate data exchanges b. they may upload data to servers
Router(config)# interface FastEthernet 0/1

17. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
Network Access
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Hosts return to listen-before-transmit mode.

18. What is a drawback of the CSMA/CD access method?
Logical Link Control sublayer
Window Size
Collisions can decrease network performance.
Network Layer

19. At which layers of the OSI model does ethernet operate?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. physical layer b. DLL layer
Host A
FTP

20. 3 factors that should be considered when implementing Layer 2 protocols
Network address
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Static
Host mobility

21. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Fiber
A physical topology.
Originate data flow.

22. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Source and Destination Ports
Console
Fiber
Create signals that represent the bits in each frame for the media.

23. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
As the commands are entered.
255.255.255.224
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. larger address space b. data types and classes of service c. authentication and encryption

24. What is the purpose of a default gateway?
It provides for the exchange of data over a common local media.
No collisions will occur on this link.
Identify the device that allows local network computers to communicate w/ devices in other networks.
To enable a receiving host to forward the data to the appropriate application.

25. Why is flow control used for TCP data transfer?
A. HTTP b. HTTPS
Twisting of the cables
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
To prevent the receiver from being overwhelmed by incoming data.

26. What is the function of the DLL?
Router(config)# interface FastEthernet 0/1
Destination Network Address
A. next-hop b. metric/interface c. destination network address
It provides for the exchange of data over a common local media.

27. When is a straight-through cable used in a network?
When connecting a host to a switch.
Host A
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. presentation c. session d. transmision e. network f. data link g. physical

28. What is the purpose of the TCP/IP Network Application Layer?
A. purpose b. geographic location c. ownership
Network Media Control
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. replace a switch w/ a router b. subnet the new networks

29. During a TCP session - if packets arrive out of order - what will happen?
Binary ANDing
The packets will be delivered and reassembled at destination.
172.16.192.160
Fiber

30. statements of IP adressing
The MAC protocol can be very simple.
Time-to-live (TTL)
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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

31. What is the purpose of the preamble in an ethernet frame?
MAC
Transport
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

32. What do the intermediary devices in the network do?
Ctrl + Shift + 6
To facilitate the entry and exit of data on media.
Host A
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

33. What are 2 features of User Diagram Protocol (UDP)?
Window Size
A. minimizing of collisions b. division into broadcast domains
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. low overhead b. connectionless

34. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A. it has centralized administration b. security is easier to enforce
Console
Is used by the server to resolve names.

35. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Originate data flow.
MAC
A. HTTP b. HTTPS
A. perform degradation b. security issues c. host identification

36. What is the primary reason for developing IPv6?
A. servers b. routers c. network printers
It has expanded adressing capabilities.
32 bits
A. hot keys b. context-sensitive c. command syntax check

37. Default Gateway is incorrect on the host - What is the impact on the communications?
As the commands are entered.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The MAC protocol can be very simple.
Application Layer

38. When a device is moved from one network to the other...?
Hosts return to listen-before-transmit mode.
The physical address is added.
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. flow control b. session establishment c. numbering and sequencing

39. To make a console connection from a comp to a Cisco router - what cable should be used?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Is used by the server to resolve names.
Rollover cable
Network address

40. What describes the purpose of default route?
A. addressing b. error detection c. frame delimiting
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

41. What can you identify when you examine the Network Layer header?
It uses lasers as the light source.
Window Size
It reduces unnecessary broadcasts.
The destination host address.

42. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
Ctrl + Shift + 6
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. show startup-config b. show running-config

43. What do you need to use for an initial configuration on a Cisco router?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Console interface
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Source Port

44. Important characteristic of UDP
Minimal delays in data delivery.
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
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Application Layer

45. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
2046
Console interface
Wireless
UTP

46. Which device is used to create or divide broadcast domains?
Router
Hub
Source and Destination Ports
Identify processes or services that are communicating with end devices.

47. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
SMB
Router
A. low overhead b. connectionless
Network address

48. Which type of cable is most often associated w/ fiber-optic cable?
Transport
255.255.255.224
A backbone cable.
Network Access

49. What is the primary rope of the physical layer in transmitting data?
A. non-deterministic b. less overhead c. collisions exist
Network Layer
Create signals that represent the bits in each frame for the media.
Source and Destination Ports

50. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
Network Layer Packet
IP Protocol
Switch