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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. 2 characteristics of clients in data networks
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. they initiate data exchanges b. they may upload data to servers
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

2. At which layers of the OSI model does ethernet operate?
A. MTA b. SMTP
A. physical layer b. DLL layer
A. addressing b. error detection c. frame delimiting
It has expanded adressing capabilities.

3. What type of network cable is used between a terminal and a console port?
A default gateway (router).
UDP
A. non-deterministic b. less overhead c. collisions exist
Rollover cable

4. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
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
The packets will be delivered and reassembled at destination.
Hub

5. What are the advantages of using a client-server model?
SMB
A. it has centralized administration b. security is easier to enforce
IP Protocol
A. copper UTP b. optical fiber

6. When is a straight-through cable used in a network?
Network Media Control
When connecting a host to a switch.
32 bits
Host A

7. What is the role of MTA in handling email?
Is used by the server to resolve names.
Ctrl + Shift + 6
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

8. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Resolve IPv4 addresses to MAC addresses.
80 (HTTP)
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

9. 3 properties of peer-2-peer applications
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
UDP
It uses lasers as the light source.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

10. What is an automated service that matches resource names w/ required IP addresses?
255.255.255.0
DNS
A. enable mode b. priviledge executive mode
Source and Destination IP address

11. When do changes take effect in a Cisco router?
Identify processes or services that are communicating with end devices.
A. non-deterministic b. less overhead c. collisions exist
As the commands are entered.
Next-Hop Address

12. What is the role of the OSI Application Layer?
Router(config)# interface FastEthernet 0/1
Application Layer
Collisions can decrease network performance.
It provides interface between applications on either end of the network.

13. What are 2 forms of application layer software?
Minimal delays in data delivery.
Source and Destination IP address
A. application b. services
OTDR

14. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A backbone cable.
Fiber
A. Cat5 UTP b. Cat6 UTP
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

15. What do end devices do?
255.255.255.224
A. HTTP b. HTTPS
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
Originate data flow.

16. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Source and Destination Ports
172.16.192.160
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

17. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
A. media sharing b. logical topology
DNS
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

18. What causes crosstalk within cable pairs when using UTP?
The MAC protocol can be very simple.
To prevent the receiver from being overwhelmed by incoming data.
The magnetic field around the adjacent pairs of wire.
A. physical layer b. DLL layer

19. What correctly describes a MAC address?
Host mobility
Twisting of the cables
Is used by the server to resolve names.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

20. Default Gateway is incorrect on the host - What is the impact on the communications?
Router(config)# interface FastEthernet 0/1
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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
IP is not properly installed

21. What is a component of a routing table entry?
IP is not properly installed
Next-Hop Address
A. enable mode b. priviledge executive mode
MAC

22. Why is flow control used for TCP data transfer?
MAC
Identify processes or services that are communicating with end devices.
To prevent the receiver from being overwhelmed by incoming data.
Rollover cable

23. What is a benefit of a WAN?
Destination Network Address
OTDR
Host mobility
A. they initiate data exchanges b. they may upload data to servers

24. What layer encapsulates segments into packets?
Network Layer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Ctrl + Shift + 6
A. copper UTP b. optical fiber

25. Important characteristic of UDP
Source and Destination IP address
Minimal delays in data delivery.
255.255.255.224
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

26. What is PDU?
Router(config)# hostname Costas
Console interface
Is a layer of specific encapsulation.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

27. 2 characteristics of peer-2-peer
A. perform degradation b. security issues c. host identification
Resolve IPv4 addresses to MAC addresses.
It reduces unnecessary broadcasts.
A. decentralized resources b. resource sharing w/o a dedicated server

28. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. netstat -r b. route PRINT
Binary ANDing
UTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

29. What describes the purpose of default route?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Console
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
SMB

30. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
TCP initializes the sequence numbers for the sessions.
Host mobility
255.255.255.224

31. What are 3 pieces of info about a route contained in a routing table?
Create signals that represent the bits in each frame for the media.
A. Physical b. Data Link
Router
A. next-hop b. metric/interface c. destination network address

32. Which 2 options represent Layer 4 addressing?
Network address
Show Interfaces
A random delay helps prevent the stations from experiencing another collision during transmission.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

33. What is a disadvantage of Telnet?
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
Is used by the server to resolve names.
It does not support encryption.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

34. What are 2 features of User Diagram Protocol (UDP)?
UTP
A. low overhead b. connectionless
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. perform degradation b. security issues c. host identification

35. What info is found in the TCP and UDP header info?
A. minimizing of collisions b. division into broadcast domains
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A backbone cable.
Source and Destination Ports

36. 3 statements about routes and their use
IP Protocol
Hub
A. decentralized resources b. resource sharing w/o a dedicated server
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

37. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
Destination Network Address
Is a layer of specific encapsulation.
The MAC protocol can be very simple.

38. What is the function of the DLL?
A. HTTP b. HTTPS
It provides for the exchange of data over a common local media.
Show Interfaces
Destination is not contacted before a packet is sent.

39. Network Protocols
A backbone cable.
Source and Destination IP address
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. goodput b. throughput c. bandwidth

40. What can you identify when you examine the Network Layer header?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. netstat -r b. route PRINT
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
The destination host address.

41. Which portion of the network layer address does a router use to forward packets?
Network portion
A. minimizing of collisions b. division into broadcast domains
Minimal delays in data delivery.
The MAC protocol can be very simple.

42. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Window Size
Rollover cable
Identify the device that allows local network computers to communicate w/ devices in other networks.

43. What is the primary reason for developing IPv6?
A. copper UTP b. optical fiber
It has expanded adressing capabilities.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Binary ANDing

44. What device can check for faults - integrity and performance of media?
OTDR
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. router b. firewall
IP is not properly installed

45. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
A. netstat -r b. route PRINT
A. DB 60 b. Winchester 15-pin c. smart serial
Identify processes or services that are communicating with end devices.

46. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
Switch
A. Cat5 UTP b. Cat6 UTP
8
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

47. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Window Size
Resolve IPv4 addresses to MAC addresses.
A. show startup-config b. show running-config
UDP

48. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
SSH
IP is not properly installed
A. the router will discard the packet b. the router will send a time exceeded message to the source host

49. What is a drawback of the CSMA/CD access method?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Router(config)# hostname Costas
Network Layer Packet
Collisions can decrease network performance.

50. Which IP packet field will prevent endless loops?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
When connecting a host to a switch.
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
Time-to-live (TTL)