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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. 3 protocols that operate in the application layer
It provides for the exchange of data over a common local media.
FTP
A. physical layer b. DLL layer
A. DNS b. SMTP c. POP

2. What are 2 email components used to forward mail between servers?
A. DB 60 b. Winchester 15-pin c. smart serial
IP Protocol
A. flow control b. session establishment c. numbering and sequencing
A. MTA b. SMTP

3. What are 2 features of User Diagram Protocol (UDP)?
A. decentralized resources b. resource sharing w/o a dedicated server
Network Media Control
A. low overhead b. connectionless
A. goodput b. throughput c. bandwidth

4. 3 common problems w/ a large network
A. router b. firewall
A. performance degradation b. security issues c. host identification
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Time-to-live (TTL)

5. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Hub
Is a layer of specific encapsulation.
A. goodput b. throughput c. bandwidth

6. What is a benefit of a WAN?
Next-Hop Address
Host mobility
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
80 (HTTP)

7. What are 3 pieces of info about a route contained in a routing table?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
OTDR
A. next-hop b. metric/interface c. destination network address
8

8. To make a console connection from a comp to a Cisco router - what cable should be used?
A. low overhead b. connectionless
172.16.192.160
Rollover cable
Supports error detection.

9. What command can be used to determine if the router has experienced any input or output errors?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
0 to 1023
Show Interfaces
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

10. Which IP packet field will prevent endless loops?
A. Physical b. Data Link
Wireless
Identify processes or services that are communicating with end devices.
Time-to-live (TTL)

11. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
Rollover cable
Router
80 (HTTP)

12. What is a drawback of the CSMA/CD access method?
Source and Destination IP address
Collisions can decrease network performance.
A. next-hop b. metric/interface c. destination network address
A. media sharing b. logical topology

13. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. media sharing b. logical topology
80 (HTTP)
Source Port
A physical topology.

14. An admin needs to keep contents private - which access method should he use?
Binary ANDing
Ctrl + Shift + 6
MAC
SSH

15. 3 statements of media acess control
SMB
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. media sharing b. logical topology
Application Layer

16. What characteristic of an UTP helps reduce interference?
Fiber
Twisting of the cables
The address of the router that the host will use to 'get to the other side'.
A. it has centralized administration b. security is easier to enforce

17. 3 facts about the network portion of an IPv4 address
8
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Is used by the server to resolve names.
A. show startup-config b. show running-config

18. What device can check for faults - integrity and performance of media?
Static
OTDR
Any device whose backoff timer expires first.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

19. What is a characteristic of a logical point-to-point topology?
Logical Link Control sublayer
Network Layer
SSH
The MAC protocol can be very simple.

20. 3 features that allow TCP to realibly and accurately track the transmission of data
A. it has centralized administration b. security is easier to enforce
A. flow control b. session establishment c. numbering and sequencing
MAC
When connecting a host to a switch.

21. What are 3 properties of contention-based media access for a shared media?
A. HTTP b. HTTPS
A. router b. firewall
A. non-deterministic b. less overhead c. collisions exist
UTP

22. What do end devices do?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. DB 60 b. Winchester 15-pin c. smart serial
A. replace a switch w/ a router b. subnet the new networks
Originate data flow.

23. 2 characteristics of clients in data networks
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. they initiate data exchanges b. they may upload data to servers
Host A
Host mobility

24. 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. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

25. Which characteristics describe fiber optic cable?
Source and Destination IP address
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. not affected by EMI of RFI b. most expensive type of LAN cabling
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

26. What can be a problem that is reduced by adding end-to-end addressing?
A. goodput b. throughput c. bandwidth
It reduces unnecessary broadcasts.
DNS
It uses lasers as the light source.

27. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
172.16.192.160
2046
Transport
Ctrl + Shift + 6

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
UDP
SSH
A. Physical b. Data Link

29. 2 characteristics of peer-2-peer
A. they initiate data exchanges b. they may upload data to servers
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. decentralized resources b. resource sharing w/o a dedicated server
A. DB 60 b. Winchester 15-pin c. smart serial

30. When destination network is not in the routing table - What are 2 actions the router might take?
A. HTTP b. HTTPS
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network portion
FTP

31. During encapsulation - what happens in the Data Link Layer?
A. HTTP b. HTTPS
The physical address is added.
Wireless
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

32. What 2 type of cables would most commonly be used for new runs?
The address of the router that the host will use to 'get to the other side'.
To prevent the receiver from being overwhelmed by incoming data.
It does not support encryption.
A. Cat5 UTP b. Cat6 UTP

33. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
A. Cat5 UTP b. Cat6 UTP
Binary ANDing
Switch

34. What is a default gateway address?

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35. What are 2 forms of application layer software?
A. application b. services
Network
Network address
A. identifies the communicating applications b. identifies multiple conversations between the hosts

36. Statements that describe LAN
A. next-hop b. metric/interface c. destination network address
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
OTDR
Logical Link Control sublayer

37. If you have a small network w/ 3 computers...
Transport
A. DNS b. SMTP c. POP
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
It reduces unnecessary broadcasts.

38. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
A. DNS b. SMTP c. POP
0 to 1023
To facilitate the entry and exit of data on media.

39. When is a straight-through cable used in a network?
A. addressing b. error detection c. frame delimiting
When connecting a host to a switch.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Router

40. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Collisions can decrease network performance.
SSH
Network
Switch

41. What is the role of MTA in handling email?
A. replace a switch w/ a router b. subnet the new networks
DNS
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Next-Hop Address

42. In a connectionless system - What is correct?
When connecting a host to a switch.
A physical topology.
Destination is not contacted before a packet is sent.
A. performance degradation b. security issues c. host identification

43. In business LANs - which connector is used w/ twisted-pair networking cable?
The packets will be delivered and reassembled at destination.
255.255.255.0
RJ-45
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

44. What are the advantages of using a client-server model?
A. low overhead b. connectionless
A. the router will discard the packet b. the router will send a time exceeded message to the source host
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. it has centralized administration b. security is easier to enforce

45. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
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
Physical
0 to 1023

46. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. low overhead b. connectionless
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
Supports error detection.
Network Layer Packet

47. What is the purpose of a default gateway?
A. it has centralized administration b. security is easier to enforce
Host mobility
Identify the device that allows local network computers to communicate w/ devices in 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

48. What layer encapsulates segments into packets?
Network address
Network Layer
Create signals that represent the bits in each frame for the media.
A. low overhead b. connectionless

49. What is the primary purpose of ARP?
A. Cat5 UTP b. Cat6 UTP
Network portion
Resolve IPv4 addresses to MAC addresses.
A. media sharing b. logical topology

50. Which device is used to create or divide broadcast domains?
A. non-deterministic b. less overhead c. collisions exist
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. replace a switch w/ a router b. subnet the new networks
Router