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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. What are 2 protocols for transfering web resources?
Minimal delays in data delivery.
A. HTTP b. HTTPS
A. replace a switch w/ a router b. subnet the new networks
Resolve IPv4 addresses to MAC addresses.

2. After an ethernet collision - which device has priority to transmit data?
A. performance degradation b. security issues c. host identification
A. servers b. routers c. network printers
Any device whose backoff timer expires first.
172.16.192.160

3. 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?
DNS
Twisting of the cables
Host A
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

4. What is the primary rope of the physical layer in transmitting data?
A default gateway (router).
Window Size
Create signals that represent the bits in each frame for the media.
A. perform degradation b. security issues c. host identification

5. What can you identify when you examine the Network Layer header?
A random delay helps prevent the stations from experiencing another collision during transmission.
The destination host address.
It does not support encryption.
A. HTTP b. HTTPS

6. What is a component of a routing table entry?
Resolve IPv4 addresses to MAC addresses.
Next-Hop Address
It has expanded adressing capabilities.
A. purpose b. geographic location c. ownership

7. In business LANs - which connector is used w/ twisted-pair networking 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
RJ-45
Binary ANDing
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

8. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A backbone cable.
Destination Network Address
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

9. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
UDP
Router
A. media sharing b. logical topology

10. What are 2 email components used to forward mail between servers?
It has expanded adressing capabilities.
A. MTA b. SMTP
Console interface
A. application b. services

11. 3 terms that define the forms of help available within the Cisco IOS
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. replace a switch w/ a router b. subnet the new networks
A. hot keys b. context-sensitive c. command syntax check
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

12. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Signal loss can be experienced.
Show Interfaces
The packets will be delivered and reassembled at destination.
Router(config)# interface FastEthernet 0/1

13. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
When connecting a host to a switch.
FTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

14. What do end devices do?
As the commands are entered.
A. hot keys b. context-sensitive c. command syntax check
Originate data flow.
A. show startup-config b. show running-config

15. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
Is used by the server to resolve names.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
To prevent the receiver from being overwhelmed by incoming data.

16. statements of IP adressing
A. next-hop b. metric/interface c. destination network address
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
Collisions can decrease network performance.
Application Layer

17. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
A. media sharing b. logical topology
DNS
A backbone cable.

18. 3 factors that should be considered when implementing Layer 2 protocols
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Network Media Control
A. hot keys b. context-sensitive c. command syntax check
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

19. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Logical Link Control sublayer
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

20. What are 3 properties of contention-based media access for a shared media?
When connecting a host to a switch.
A. non-deterministic b. less overhead c. collisions exist
Destination is not contacted before a packet is sent.
Is used by the server to resolve names.

21. What is the primary function of encapsulating packets into frames?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To facilitate the entry and exit of data on media.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Network

22. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
Network address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

23. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
255.255.255.0
Network address
Network portion

24. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
0 to 1023
Originate data flow.
A. it has centralized administration b. security is easier to enforce

25. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
172.16.192.160
Fiber
Transport
Binary ANDing

26. Which portion of the network layer address does a router use to forward packets?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. MTA b. SMTP
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

27. What networking devices are recommended to be assigned static IP addresses?
Fiber
A. servers b. routers c. network printers
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Host mobility

28. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
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
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
0 to 1023

29. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
TCP initializes the sequence numbers for the sessions.
Next-Hop Address
A. they initiate data exchanges b. they may upload data to servers

30. What statements describe the logical token-passing topology?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. enable mode b. priviledge executive mode
32 bits

31. How does the application layer on a server process multiple client requests for services?
It uses lasers as the light source.
A physical topology.
It uses support from the lower layers to distinguish between connections to the service.
IP Protocol

32. Which 2 options represent Layer 4 addressing?
Rollover cable
Static
The address of the router that the host will use to 'get to the other side'.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

33. What is the purpose of resource records in DNS?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
IP is not properly installed
Is used by the server to resolve names.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

34. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. the router will discard the packet b. the router will send a time exceeded message to the source host
UTP
RJ-45
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

35. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
No collisions will occur on this link.
Ctrl + Shift + 6
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

36. What is a protocol that provides connectionless network layer services?
255.255.255.224
IP Protocol
Network portion
A. netstat -r b. route PRINT

37. 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?
8
Physical
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. low overhead b. connectionless

38. 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?
TCP initializes the sequence numbers for the sessions.
A. they initiate data exchanges b. they may upload data to servers
Router(config)# hostname Costas
They must wait until the first hosts finish transfering the media.

39. What are 3 common problems w/ large networks?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
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
2046

40. What is the role of the OSI Application Layer?
Source and Destination Ports
It provides interface between applications on either end of the network.
A. perform degradation b. security issues c. host identification
A. larger address space b. data types and classes of service c. authentication and encryption

41. 3 measures of data transfer
255.255.255.0
A. DB 60 b. Winchester 15-pin c. smart serial
Switch
A. goodput b. throughput c. bandwidth

42. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Is used by the server to resolve names.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Source and Destination Ports

43. What makes fiber preferable to copper for interconnecting buildings?
255.255.255.224
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. application b. services

44. There are too many broadcasts on switches - what can be done?
Fiber
A physical topology.
A. replace a switch w/ a router b. subnet the new networks
Transport

45. What is an effect of improperly applying a network cable connector?
Hub
Signal loss can be experienced.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. it has centralized administration b. security is easier to enforce

46. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Source and Destination Ports
Hosts return to listen-before-transmit mode.
A. copper UTP b. optical fiber

47. Which type of cable is most often associated w/ fiber-optic cable?
2046
Application Layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A backbone cable.

48. Which layer supplies services and allows user interface?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Wireless
Application Layer

49. 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?
A. it has centralized administration b. security is easier to enforce
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
The packets will be delivered and reassembled at destination.
2046

50. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Switch
Supports error detection.
255.255.255.0
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1