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CCNA - 2

Instructions:

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 are 2 protocols for transfering web resources?
It uses support from the lower layers to distinguish between connections to the service.
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
Console
A. HTTP b. HTTPS

2. Which IP packet field will prevent endless loops?
Source and Destination Ports
Source Port
Time-to-live (TTL)
Router

3. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. HTTP b. HTTPS
A. servers b. routers c. network printers
Time-to-live (TTL)

4. At which layers of the OSI model does ethernet operate?
Is used by the server to resolve names.
The destination host address.
A. physical layer b. DLL layer
FTP

5. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Binary ANDing
A. larger address space b. data types and classes of service c. authentication and encryption
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

6. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Next-Hop Address
Switch
255.255.255.224
It does not support encryption.

7. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
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
Fiber
A. physical layer b. DLL layer

8. statements of IP adressing
A. MTA b. SMTP
RJ-45
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
UTP

9. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Source and Destination Ports
Minimal delays in data delivery.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. Physical b. Data Link

10. Which layer supplies services and allows user interface?
The destination host address.
Minimal delays in data delivery.
Application Layer
Router

11. What are 3 common problems w/ large networks?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. perform degradation b. security issues c. host identification
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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

12. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
0 to 1023
The destination host address.
It uses lasers as the light source.

13. What determines the method of media access control?
A backbone cable.
A. media sharing b. logical topology
A. flow control b. session establishment c. numbering and sequencing
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

14. To make a console connection from a comp to a Cisco router - what cable should be used?
Fiber
80 (HTTP)
Rollover cable
Physical

15. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Any device whose backoff timer expires first.
When connecting a host to a switch.

16. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. addressing b. error detection c. frame delimiting
Hub
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
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

17. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Resolve IPv4 addresses to MAC addresses.
Host mobility
A. DB 60 b. Winchester 15-pin c. smart serial
Network

18. 3 features that allow TCP to realibly and accurately track the transmission of data
255.255.255.0
Source and Destination IP address
A. flow control b. session establishment c. numbering and sequencing
SMB

19. What is the role of the OSI Application Layer?
Console
It provides interface between applications on either end of the network.
80 (HTTP)
SSH

20. What is the primary purpose of ARP?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
UDP
Fiber
Resolve IPv4 addresses to MAC addresses.

21. 3 statements about the role of routers in the network
The physical address is added.
Show Interfaces
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. decentralized resources b. resource sharing w/o a dedicated server

22. What is a drawback of the CSMA/CD access method?
A physical topology.
It does not support encryption.
A. DNS b. SMTP c. POP
Collisions can decrease network performance.

23. What networking devices are recommended to be assigned static IP addresses?
The magnetic field around the adjacent pairs of wire.
A. decentralized resources b. resource sharing w/o a dedicated server
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. servers b. routers c. network printers

24. 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
A. goodput b. throughput c. bandwidth
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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

25. When a device is moved from one network to the other...?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final 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
Static
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

26. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. Cat5 UTP b. Cat6 UTP
A. replace a switch w/ a router b. subnet the new networks
A. identifies the communicating applications b. identifies multiple conversations between the hosts

27. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
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
No collisions will occur on this link.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Hosts return to listen-before-transmit mode.

28. What are 3 pieces of info about a route contained in a routing table?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Twisting of the cables
A. next-hop b. metric/interface c. destination network address
Source Port

29. What is a characteristic of a logical point-to-point topology?
A. replace a switch w/ a router b. subnet the new networks
Source and Destination Ports
The MAC protocol can be very simple.
Transport

30. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. low overhead b. connectionless
0 to 1023
Switch
Identify processes or services that are communicating with end devices.

31. 2 functions of encapsulation
Network Access
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
DNS
A. replace a switch w/ a router b. subnet the new networks

32. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
As the commands are entered.
Network portion

33. When a network service fails - which port is most often used to access a router for management purposes?
TCP initializes the sequence numbers for the sessions.
A. copper UTP b. optical fiber
Console
Rollover cable

34. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Router
OTDR
A. larger address space b. data types and classes of service c. authentication and encryption

35. 3 functions of the upper data link sublayer in the OSI model
Source and Destination IP address
A. purpose b. geographic location c. ownership
Supports error detection.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

36. 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?
UDP
2046
Host A
Flash

37. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
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
Console interface
A. media sharing b. logical topology

38. What are 2 common characteristics associated w/ dynamic routing protocols?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
80 (HTTP)
2046

39. What command can be used to determine if the router has experienced any input or output errors?
Wireless
A. Physical b. Data Link
Show Interfaces
Host A

40. 3 statements of media acess control
Supports error detection.
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Router(config)# interface FastEthernet 0/1

41. Which portion of the network layer address does a router use to forward packets?
The magnetic field around the adjacent pairs of wire.
IP is not properly installed
A. next-hop b. metric/interface c. destination network address
Network portion

42. What is the function of the DLL?
A. router b. firewall
The destination host address.
255.255.255.224
It provides for the exchange of data over a common local media.

43. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
OTDR
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Next-Hop Address

44. What info is found in the TCP and UDP header info?
Collisions can decrease network performance.
Source and Destination Ports
Application Layer
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

45. 3 terms that define the forms of help available within the Cisco IOS
The MAC protocol can be very simple.
SSH
Static
A. hot keys b. context-sensitive c. command syntax check

46. When do changes take effect in a Cisco router?
As the commands are entered.
A. minimizing of collisions b. division into broadcast domains
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It reduces unnecessary broadcasts.

47. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Network portion
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

48. 3 protocols that operate in the application layer
A. larger address space b. data types and classes of service c. authentication and encryption
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
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. DNS b. SMTP c. POP

49. What are 2 forms of application layer software?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The packets will be delivered and reassembled at destination.
A. application b. services
A. minimizing of collisions b. division into broadcast domains

50. 3 facts about the network portion of an IPv4 address
A. purpose b. geographic location c. ownership
Network Access
A. physical layer b. DLL layer
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

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CCNA - 2

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