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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. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
IP Protocol
Physical
Host mobility
Switch

2. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. Cat5 UTP b. Cat6 UTP
Signal loss can be experienced.
Physical
80 (HTTP)

3. 2 characteristics of clients in data networks
Physical
Application Layer
A. they initiate data exchanges b. they may upload data to servers
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

4. statements of IP adressing
Wireless
Twisting of the cables
A. larger address space b. data types and classes of service c. authentication and encryption
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

5. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Console interface
0 to 1023
Identify processes or services that are communicating with end devices.
Transport

6. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. servers b. routers c. network printers
255.255.255.0
A default gateway (router).

7. What type of network cable is used between a terminal and a console port?
Ctrl + Shift + 6
A. netstat -r b. route PRINT
Router(config)# hostname Costas
Rollover cable

8. 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. goodput b. throughput c. bandwidth
A. show startup-config b. show running-config
Router
Binary ANDing

9. What are 2 email components used to forward mail between servers?
Network Media Control
The destination host address.
A. MTA b. SMTP
Host mobility

10. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
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
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

11. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
To prevent the receiver from being overwhelmed by incoming data.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
255.255.255.0

12. An admin needs to keep contents private - which access method should he use?
A. they initiate data exchanges b. they may upload data to servers
255.255.255.224
A random delay helps prevent the stations from experiencing another collision during transmission.
SSH

13. What is an effect of improperly applying a network cable connector?
A. copper UTP b. optical fiber
Identify processes or services that are communicating with end devices.
Network Access
Signal loss can be experienced.

14. 2 features that make switches preferable to hubs
Network Access
A. hot keys b. context-sensitive c. command syntax check
To prevent the receiver from being overwhelmed by incoming data.
A. minimizing of collisions b. division into broadcast domains

15. What do end devices do?
Rollover cable
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Originate data flow.
Host A

16. What is the function of the DLL?
Source Port
A. replace a switch w/ a router b. subnet the new networks
It provides for the exchange of data over a common local media.
SSH

17. What is an automated service that matches resource names w/ required IP addresses?
Signal loss can be experienced.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
As the commands are entered.
DNS

18. At which layers of the OSI model does ethernet operate?
Hosts return to listen-before-transmit mode.
A. physical layer b. DLL layer
IP Protocol
0 to 1023

19. When a device is moved from one network to the other...?
A random delay helps prevent the stations from experiencing another collision during transmission.
Twisting of the cables
A. flow control b. session establishment c. numbering and sequencing
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

20. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
A. flow control b. session establishment c. numbering and sequencing
A. copper UTP b. optical fiber
It provides interface between applications on either end of the network.

21. What are key considering factors when grouping hosts into common networks?
Network Media Control
A. purpose b. geographic location c. ownership
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Router(config)# hostname Costas

22. What does the IEEE 802.2 standard represent in Ethernet technologies?
When connecting a host to a switch.
Logical Link Control sublayer
A physical topology.
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

23. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
Logical Link Control sublayer
A. router b. firewall
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

24. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Wireless
Network portion
Hosts return to listen-before-transmit mode.

25. Which characteristics describe fiber optic cable?
Physical
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Media Control
A. not affected by EMI of RFI b. most expensive type of LAN cabling

26. What is a benefit of a WAN?
Binary ANDing
Next-Hop Address
Static
Host mobility

27. What makes fiber preferable to copper for interconnecting buildings?
A. Cat5 UTP b. Cat6 UTP
A. non-deterministic b. less overhead c. collisions exist
A physical topology.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

28. What are 2 common characteristics associated w/ dynamic routing protocols?
UDP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network Layer
TCP initializes the sequence numbers for the sessions.

29. If you have a full-duplex operational network - what can happen?
A. application b. services
A. next-hop b. metric/interface c. destination network address
Window Size
No collisions will occur on this link.

30. What device can check for faults - integrity and performance of media?
A. router b. firewall
It provides interface between applications on either end of the network.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
OTDR

31. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Host A
A. it has centralized administration b. security is easier to enforce
Fiber
Collisions can decrease network performance.

32. 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?
A. HTTP b. HTTPS
RJ-45
The magnetic field around the adjacent pairs of wire.
172.16.192.160

33. What is the primary function of encapsulating packets into frames?
OTDR
To facilitate the entry and exit of data on media.
A. media sharing b. logical topology
A. non-deterministic b. less overhead c. collisions exist

34. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
Source and Destination Ports
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

35. 3 statements about routes and their use
Minimal delays in data delivery.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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
32 bits

36. 3 factors that should be considered when implementing Layer 2 protocols
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
IP is not properly installed
A. DNS b. SMTP c. POP

37. Which type of cable is most often associated w/ fiber-optic cable?
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
IP Protocol
A backbone cable.
A. enable mode b. priviledge executive mode

38. What are 2 features of User Diagram Protocol (UDP)?
Rollover cable
It does not support encryption.
Console interface
A. low overhead b. connectionless

39. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. purpose b. geographic location c. ownership
Is a layer of specific encapsulation.
A. DB 60 b. Winchester 15-pin c. smart serial
Host A

40. What do the intermediary devices in the network do?
A backbone cable.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The physical address is added.
Host mobility

41. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
The address of the router that the host will use to 'get to the other side'.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Supports error detection.

42. To make a console connection from a comp to a Cisco router - what cable should be used?
Create signals that represent the bits in each frame for the media.
It provides interface between applications on either end of the network.
Rollover cable
32 bits

43. What describes the purpose of default route?
Originate data flow.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
8

44. When destination network is not in the routing table - What are 2 actions the router might take?
Wireless
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Signal loss can be experienced.
A. they initiate data exchanges b. they may upload data to servers

45. If you have a small network w/ 3 computers...
Rollover cable
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
As the commands are entered.
The destination host address.

46. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Host mobility
SMB
The packets will be delivered and reassembled at destination.
Network Layer Packet

47. 3 terms that define the forms of help available within the Cisco IOS
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Fiber
A. hot keys b. context-sensitive c. command syntax check
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

48. What is the purpose of a default gateway?
A. they initiate data exchanges b. they may upload data to servers
Identify the device that allows local network computers to communicate w/ devices in other networks.
Physical
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

49. Why are port numbers included in the TCP header of a segment?
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
To enable a receiving host to forward the data to the appropriate application.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Rollover cable

50. What is the purpose of the preamble in an ethernet frame?
A. decentralized resources b. resource sharing w/o a dedicated server
Network Media Control
A. low overhead b. connectionless
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

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CCNA - 2

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