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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. 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. servers b. routers c. network printers
A. show startup-config b. show running-config
Identify processes or services that are communicating with end devices.
Hub

2. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. Cat5 UTP b. Cat6 UTP
Transport
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

3. Which IP packet field will prevent endless loops?
A default gateway (router).
Time-to-live (TTL)
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
Router

4. Which 2 options represent Layer 4 addressing?
Router
A. MTA b. SMTP
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. identifies the communicating applications b. identifies multiple conversations between the hosts

5. What are 2 forms of application layer software?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Signal loss can be experienced.
A. application b. services
A default gateway (router).

6. What method of signal transmission uses radio waves to carry signals?
Create signals that represent the bits in each frame for the media.
A. addressing b. error detection c. frame delimiting
A. netstat -r b. route PRINT
Wireless

7. When do changes take effect in a Cisco router?
As the commands are entered.
It does not support encryption.
A. MTA b. SMTP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

8. What is dinamically selected by the source host when forwarding data?
A. media sharing b. logical topology
Source Port
A. Cat5 UTP b. Cat6 UTP
A. replace a switch w/ a router b. subnet the new networks

9. 2 features that make switches preferable to hubs
A. router b. firewall
Twisting of the cables
It has expanded adressing capabilities.
A. minimizing of collisions b. division into broadcast domains

10. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
A. replace a switch w/ a router b. subnet the new networks
80 (HTTP)
Identify the device that allows local network computers to communicate w/ devices in other networks.

11. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
UTP
RJ-45
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

12. What are key considering factors when grouping hosts into common networks?
Console interface
It uses support from the lower layers to distinguish between connections to the service.
A. performance degradation b. security issues c. host identification
A. purpose b. geographic location c. ownership

13. 3 properties of peer-2-peer applications
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Next-Hop Address
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
Router(config)# interface FastEthernet 0/1

14. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Time-to-live (TTL)
A random delay helps prevent the stations from experiencing another collision during transmission.
A. it has centralized administration b. security is easier to enforce
Network address

15. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
255.255.255.0
The MAC protocol can be very simple.
When connecting a host to a switch.

16. What do you need to use for an initial configuration on a Cisco router?
Console interface
Flash
8
Minimal delays in data delivery.

17. What can you identify when you examine the Network Layer header?
A. Physical b. Data Link
The MAC protocol can be very simple.
The magnetic field around the adjacent pairs of wire.
The destination host address.

18. What is PDU?
Is a layer of specific encapsulation.
Resolve IPv4 addresses to MAC addresses.
IP Protocol
Network Layer

19. 3 characteristics of valid Ethernet Layer 2 addresses
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Destination is not contacted before a packet is sent.
A physical topology.

20. 2 functions of encapsulation
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
Network
Fiber
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

21. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. addressing b. error detection c. frame delimiting
UDP
OTDR
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

22. What is a protocol that provides connectionless network layer services?
IP Protocol
A. hot keys b. context-sensitive c. command syntax check
Destination is not contacted before a packet is sent.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

23. 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?
Fiber
172.16.192.160
A. hot keys b. context-sensitive c. command syntax check
A. router b. firewall

24. Intermediary devices used to implement security between networks
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. router b. firewall
Binary ANDing
Next-Hop Address

25. 3 primary functions of the data link layer encapsulation
A. next-hop b. metric/interface c. destination network address
Ctrl + Shift + 6
A. addressing b. error detection c. frame delimiting
A. DNS b. SMTP c. POP

26. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
A. HTTP b. HTTPS
When connecting a host to a switch.
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

27. An admin needs to keep contents private - which access method should he use?
Hub
SSH
MAC
A. enable mode b. priviledge executive mode

28. If there is a graphic representation of a company network wiring and equipment - What is this called?
Next-Hop Address
A physical topology.
Source and Destination Ports
A backbone cable.

29. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. copper UTP b. optical fiber
IP is not properly installed
SMB

30. What application layer protocol is used to support file transfers between client and server?
A. Cat5 UTP b. Cat6 UTP
It does not support encryption.
FTP
Fiber

31. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
When connecting a host to a switch.
Rollover cable
A. MTA b. SMTP

32. What is the purpose of the preamble in an ethernet frame?
It uses support from the lower layers to distinguish between connections to the service.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
To enable a receiving host to forward the data to the appropriate application.
A. performance degradation b. security issues c. host identification

33. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. purpose b. geographic location c. ownership
A. DB 60 b. Winchester 15-pin c. smart serial
A. low overhead b. connectionless
A. HTTP b. HTTPS

34. 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?
Network portion
Network
Host A
Source and Destination IP address

35. What is the function of the DLL?
A. physical layer b. DLL layer
It provides for the exchange of data over a common local media.
A. DB 60 b. Winchester 15-pin c. smart serial
Supports error detection.

36. 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. perform degradation b. security issues c. host identification
A. DB 60 b. Winchester 15-pin c. smart serial
Wireless

37. Where is the IOS file stored at?
A. copper UTP b. optical fiber
Flash
80 (HTTP)
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

38. What correctly describes a MAC address?
It does not support encryption.
When connecting a host to a switch.
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

39. Which portion of the network layer address does a router use to forward packets?
Network
Ctrl + Shift + 6
Network portion
It does not support encryption.

40. What type of network cable is used between a terminal and a console port?
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
Show Interfaces
Rollover cable
A. low overhead b. connectionless

41. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. show startup-config b. show running-config
Physical
Logical Link Control sublayer

42. 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?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. physical layer b. DLL layer
They must wait until the first hosts finish transfering the media.
SSH

43. When destination network is not in the routing table - What are 2 actions the router might take?
A. media sharing b. logical topology
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. next-hop b. metric/interface c. destination network address

44. What is a default gateway address?

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45. There are too many broadcasts on switches - what can be done?
Originate data flow.
Window Size
A. low overhead b. connectionless
A. replace a switch w/ a router b. subnet the new networks

46. At which layers of the OSI model does ethernet operate?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
To prevent the receiver from being overwhelmed by incoming data.
A. physical layer b. DLL layer
Next-Hop Address

47. What statements describe the logical token-passing topology?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. show startup-config b. show running-config

48. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
A. perform degradation b. security issues c. host identification
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
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

49. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Time-to-live (TTL)
Source and Destination Ports

50. 3 functions of the upper data link sublayer in the OSI model
Show Interfaces
UDP
Source and Destination IP address
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

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CCNA - 2

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