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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. What are key considering factors when grouping hosts into common networks?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. purpose b. geographic location c. ownership
A. application b. presentation c. session d. transmision e. network f. data link g. physical
To facilitate the entry and exit of data on media.

2. What application layer protocol is used to support file transfers between client and server?
Host A
Router
Source and Destination Ports
FTP

3. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
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
SMB
A. application b. services

4. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. next-hop b. metric/interface c. destination network address
A. addressing b. error detection c. frame delimiting
Network address
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

5. What is the purpose of resource records in DNS?
Fiber
Is used by the server to resolve names.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. DNS b. SMTP c. POP

6. What information is added during encapsulation at OSI Layer 3?
A. Physical b. Data Link
Network
Source and Destination IP address
Flash

7. What causes crosstalk within cable pairs when using UTP?
It provides for the exchange of data over a common local media.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The magnetic field around the adjacent pairs of wire.
A. purpose b. geographic location c. ownership

8. 3 measures of data transfer
Hub
Is used by the server to resolve names.
A. goodput b. throughput c. bandwidth
A random delay helps prevent the stations from experiencing another collision during transmission.

9. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
A. servers b. routers c. network printers
A. application b. services
Network address

10. What type of network cable is used between a terminal and a console port?
Flash
Minimal delays in data delivery.
Rollover cable
SMB

11. 3 primary functions of the data link layer encapsulation
A. larger address space b. data types and classes of service c. authentication and encryption
A. addressing b. error detection c. frame delimiting
A. physical layer b. DLL layer
Network portion

12. 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
To facilitate the entry and exit of data on media.
Next-Hop Address
A. physical layer b. DLL layer

13. What characteristic of an UTP helps reduce interference?
Logical Link Control sublayer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
8
Twisting of the cables

14. Which portion of the network layer address does a router use to forward packets?
Any device whose backoff timer expires first.
Source and Destination Ports
Network portion
Transport

15. Which IP packet field will prevent endless loops?
To enable a receiving host to forward the data to the appropriate application.
No collisions will occur on this link.
Time-to-live (TTL)
A default gateway (router).

16. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
IP is not properly installed
RJ-45
They must wait until the first hosts finish transfering the media.

17. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
It has expanded adressing capabilities.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network Layer

18. Which device is used to create or divide broadcast domains?
Router
Collisions can decrease network performance.
To prevent the receiver from being overwhelmed by incoming data.
Next-Hop Address

19. When destination network is not in the routing table - What are 2 actions the router might take?
Source and Destination IP address
It provides for the exchange of data over a common local media.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
32 bits

20. Statements that describe LAN
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Host A
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

21. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
Console interface
It does not support encryption.
DNS

22. What determines the method of media access control?
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
Destination is not contacted before a packet is sent.
Logical Link Control sublayer
A. media sharing b. logical topology

23. 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?
UTP
SSH
Fiber
2046

24. What is a default gateway address?

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25. What is the primary rope of the physical layer in transmitting data?
To prevent the receiver from being overwhelmed by incoming data.
32 bits
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Create signals that represent the bits in each frame for the media.

26. What is PDU?
Console interface
Wireless
When connecting a host to a switch.
Is a layer of specific encapsulation.

27. What is the proper order of the OSI Layers?
A. replace a switch w/ a router b. subnet the new networks
It does not support encryption.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. Cat5 UTP b. Cat6 UTP

28. 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
Flash
A. copper UTP b. optical fiber
A. application b. presentation c. session d. transmision e. network f. data link g. physical

29. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Minimal delays in data delivery.
A. DB 60 b. Winchester 15-pin c. smart serial
Show Interfaces
Ctrl + Shift + 6

30. What type of routing uses information that is manually entered into the routing table?
A physical topology.
Static
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Show Interfaces

31. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
It uses support from the lower layers to distinguish between connections to the service.
Identify processes or services that are communicating with end devices.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

32. At which layers of the OSI model does ethernet operate?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Supports error detection.
To enable a receiving host to forward the data to the appropriate application.
A. physical layer b. DLL layer

33. Where is the IOS file stored at?
172.16.192.160
Router(config)# hostname Costas
A. Cat5 UTP b. Cat6 UTP
Flash

34. What describes the purpose of default route?
It provides interface between applications on either end of the network.
A. non-deterministic b. less overhead c. collisions exist
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Minimal delays in data delivery.

35. 3 features of IPv6
A. goodput b. throughput c. bandwidth
A. larger address space b. data types and classes of service c. authentication and encryption
Physical
A. show startup-config b. show running-config

36. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP Protocol
Source Port
Network Layer Packet
IP is not properly installed

37. Why are port numbers included in the TCP header of a segment?
Logical Link Control sublayer
OTDR
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
To enable a receiving host to forward the data to the appropriate application.

38. 3 statements about the role of routers in the network
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
Wireless
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
8

39. During a TCP session - if packets arrive out of order - what will happen?
Flash
Hosts return to listen-before-transmit mode.
The packets will be delivered and reassembled at destination.
It uses lasers as the light source.

40. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. larger address space b. data types and classes of service c. authentication and encryption
A. enable mode b. priviledge executive mode
A. media sharing b. logical topology
Physical

41. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Layer Packet
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. replace a switch w/ a router b. subnet the new networks

42. When do changes take effect in a Cisco router?
A. replace a switch w/ a router b. subnet the new networks
As the commands are entered.
OTDR
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

43. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It uses lasers as the light source.
Hosts return to listen-before-transmit mode.
A default gateway (router).
255.255.255.0

44. What do end devices do?
Collisions can decrease network performance.
A physical topology.
Originate data flow.
Identify processes or services that are communicating with end devices.

45. When a device is moved from one network to the other...?
A. DNS b. SMTP c. POP
Static
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
SSH

46. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Collisions can decrease network performance.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The MAC protocol can be very simple.

47. What is the role of MTA in handling email?
SSH
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Rollover cable
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

48. 2 features that make switches preferable to hubs
IP is not properly installed
A. show startup-config b. show running-config
Network portion
A. minimizing of collisions b. division into broadcast domains

49. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. minimizing of collisions b. division into broadcast domains
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
Network Access

50. What is the primary purpose of ARP?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Collisions can decrease network performance.
Resolve IPv4 addresses to MAC addresses.
No collisions will occur on this link.

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CCNA - 2

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