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CCNA - 2

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
FTP
Signal loss can be experienced.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

2. What application layer protocol is used to support file transfers between client and server?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Twisting of the cables
FTP
Network

3. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Source and Destination IP address
Resolve IPv4 addresses to MAC addresses.

4. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
To enable a receiving host to forward the data to the appropriate application.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. they initiate data exchanges b. they may upload data to servers

5. What are 2 forms of application layer software?
A. application b. services
A. perform degradation b. security issues c. host identification
Is a layer of specific encapsulation.
When connecting a host to a switch.

6. What type of network cable is used between a terminal and a console port?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Is used by the server to resolve names.
Rollover cable
255.255.255.224

7. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. next-hop b. metric/interface c. destination network address
Fiber
Network Layer
Wireless

8. When a network service fails - which port is most often used to access a router for management purposes?
Console
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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 Access

9. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. physical layer b. DLL layer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. application b. presentation c. session d. transmision e. network f. data link g. physical

10. What are the advantages of using a client-server model?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The destination host address.
A. it has centralized administration b. security is easier to enforce
Rollover cable

11. Intermediary devices used to implement security between networks
A. router b. firewall
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.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

12. What is an automated service that matches resource names w/ required IP addresses?
DNS
80 (HTTP)
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. router b. firewall

13. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
They must wait until the first hosts finish transfering the media.
The packets will be delivered and reassembled at destination.
IP is not properly installed
A. netstat -r b. route PRINT

14. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
A. physical layer b. DLL layer
Network
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

15. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
SSH
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
IP Protocol
Network Access

16. What kind of problems are caused by excessive broadcast traffic on network segments?
Network address
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
TCP initializes the sequence numbers for the sessions.
A default gateway (router).

17. Important characteristic of UDP
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Minimal delays in data delivery.
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

18. Which characteristics describe fiber optic cable?
Network Layer
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Hub
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

19. In a connectionless system - What is correct?
Router
Is a layer of specific encapsulation.
Destination is not contacted before a packet is sent.
A. goodput b. throughput c. bandwidth

20. 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.
A. addressing b. error detection c. frame delimiting
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. goodput b. throughput c. bandwidth

21. Default Gateway is incorrect on the host - What is the impact on the communications?
The MAC protocol can be very simple.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the 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
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

22. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Static
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Hub
It provides for the exchange of data over a common local media.

23. What is PDU?
Is a layer of specific encapsulation.
A. DNS b. SMTP c. POP
SSH
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

24. An admin needs to keep contents private - which access method should he use?
Logical Link Control sublayer
SSH
A. media sharing b. logical topology
As the commands are entered.

25. What correctly describes a MAC address?
SMB
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Console interface

26. 3 terms that define the forms of help available within the Cisco IOS
A. show startup-config b. show running-config
A. hot keys b. context-sensitive c. command syntax check
32 bits
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

27. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
UDP
Destination is not contacted before a packet is sent.
A physical topology.

28. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
To enable a receiving host to forward the data to the appropriate application.
Network
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Hosts return to listen-before-transmit mode.

29. 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. copper UTP b. optical fiber
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
FTP

30. 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
Hosts return to listen-before-transmit mode.
172.16.192.160
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

31. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
IP Protocol
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Network address
A. next-hop b. metric/interface c. destination network address

32. What causes crosstalk within cable pairs when using UTP?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The magnetic field around the adjacent pairs of wire.
The destination host address.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

33. There are too many broadcasts on switches - what can be done?
Router
Network Media Control
When connecting a host to a switch.
A. replace a switch w/ a router b. subnet the new networks

34. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
RJ-45
Physical
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Hub

35. What event occurs during the 3-way handshake?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
TCP initializes the sequence numbers for the sessions.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The magnetic field around the adjacent pairs of wire.

36. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It does not support encryption.

37. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Network portion
The destination host address.
A. DB 60 b. Winchester 15-pin c. smart serial
Is used by the server to resolve names.

38. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Hub
Host mobility
255.255.255.0
A. netstat -r b. route PRINT

39. What is the function of the DLL?
It provides for the exchange of data over a common local media.
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. servers b. routers c. network printers

40. 2 characteristics of clients in data networks
Switch
0 to 1023
A. they initiate data exchanges b. they may upload data to servers
When connecting a host to a switch.

41. When destination network is not in the routing table - What are 2 actions the router might take?
Network portion
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
MAC

42. Statements that describe LAN
A. Cat5 UTP b. Cat6 UTP
Twisting of the cables
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

43. At which layer of the TCP/IP model does ethernet operate?
Network portion
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. enable mode b. priviledge executive mode
Network Access

44. What is a characteristic of a single-mode fiber-optic cable?
A. replace a switch w/ a router b. subnet the new networks
A. servers b. routers c. network printers
It does not support encryption.
It uses lasers as the light source.

45. What is the purpose of the preamble in an ethernet frame?
Identify processes or services that are communicating with end devices.
Signal loss can be experienced.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
8

46. What are 2 protocols for transfering web resources?
Signal loss can be experienced.
Console
A. HTTP b. HTTPS
Flash

47. What is the purpose of resource records in DNS?
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
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A physical topology.
Is used by the server to resolve names.

48. 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
Source and Destination IP address
Wireless
A. flow control b. session establishment c. numbering and sequencing

49. If you have a small network w/ 3 computers...
0 to 1023
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
Binary ANDing
The physical address is added.

50. 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. 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
172.16.192.160
The destination host address.
Host mobility

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CCNA - 2

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