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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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1. 3 characteristics of valid Ethernet Layer 2 addresses
Resolve IPv4 addresses to MAC addresses.
Network portion
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Router(config)# interface FastEthernet 0/1

2. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Flash
IP Protocol
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
0 to 1023

3. Intermediary devices used to implement security between networks
A. media sharing b. logical topology
Show Interfaces
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. router b. firewall

4. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. identifies the communicating applications b. identifies multiple conversations between the hosts

5. 2 functions of encapsulation
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
The destination host address.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

6. 2 most commonly used media types in ethernet networks
80 (HTTP)
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
A. copper UTP b. optical fiber

7. When do changes take effect in a Cisco router?
It reduces unnecessary broadcasts.
As the commands are entered.
80 (HTTP)
Console interface

8. What is dinamically selected by the source host when forwarding data?
Source and Destination Ports
To enable a receiving host to forward the data to the appropriate application.
UTP
Source Port

9. 2 features that make switches preferable to hubs
Static
Collisions can decrease network performance.
A. minimizing of collisions b. division into broadcast domains
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

10. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Static
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. router b. firewall

11. What is a drawback of the CSMA/CD access method?
Host mobility
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Collisions can decrease network performance.

12. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
A. purpose b. geographic location c. ownership
A. addressing b. error detection c. frame delimiting
A. show startup-config b. show running-config
IP Protocol

13. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. Cat5 UTP b. Cat6 UTP
A. enable mode b. priviledge executive mode
80 (HTTP)
Binary ANDing

14. What type of routing uses information that is manually entered into the routing table?
When connecting a host to a switch.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Static
Source Port

15. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
Application Layer
255.255.255.224
Wireless

16. 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.
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
Network portion

17. Default Gateway is incorrect on the host - What is the impact on the communications?
The packets will be delivered and reassembled at destination.
8
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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

18. What is PDU?
Console
Is a layer of specific encapsulation.
As the commands are entered.
255.255.255.224

19. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
It does not support encryption.
Identify processes or services that are communicating with end devices.
A. MTA b. SMTP

20. How many bits make up an IPv4 address?
Destination is not contacted before a packet is sent.
To facilitate the entry and exit of data on media.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
32 bits

21. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
It provides interface between applications on either end of the network.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Physical
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

22. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A physical topology.
It does not support encryption.
Next-Hop Address

23. Network Protocols
A. servers b. routers c. network printers
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. addressing b. error detection c. frame delimiting

24. Which type of cable is most often associated w/ fiber-optic cable?
The magnetic field around the adjacent pairs of wire.
Application Layer
A backbone cable.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

25. What layer encapsulates segments into packets?
Network Layer
A. MTA b. SMTP
Host A
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

26. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
RJ-45
A. physical layer b. DLL layer
Create signals that represent the bits in each frame for the media.

27. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
The packets will be delivered and reassembled at destination.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Originate data flow.
A. servers b. routers c. network printers

28. 3 measures of data transfer
Twisting of the cables
A. goodput b. throughput c. bandwidth
A. decentralized resources b. resource sharing w/o a dedicated server
Network address

29. What application layer protocol is used to support file transfers between client and server?
FTP
A random delay helps prevent the stations from experiencing another collision during transmission.
Application Layer
RJ-45

30. What command can be used to determine if the router has experienced any input or output errors?
A. enable mode b. priviledge executive mode
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. flow control b. session establishment c. numbering and sequencing
Show Interfaces

31. When a device is moved from one network to the other...?
A. HTTP b. HTTPS
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. 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
Network Access

32. What is the purpose of the preamble in an ethernet frame?
A. goodput b. throughput c. bandwidth
A. DNS b. SMTP c. POP
Network Layer Packet
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

33. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
2046
Transport
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. addressing b. error detection c. frame delimiting

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
A. next-hop b. metric/interface c. destination network address
As the commands are entered.
Router

35. What do you need to use for an initial configuration on a Cisco router?
Console interface
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
255.255.255.0
Show Interfaces

36. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. hot keys b. context-sensitive c. command syntax check
Application Layer
It reduces unnecessary broadcasts.

37. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. application b. services
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Hub

38. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Console
It uses support from the lower layers to distinguish between connections to the service.

39. If there is a graphic representation of a company network wiring and equipment - What is this called?
The destination host address.
Destination Network Address
A physical topology.
Hosts return to listen-before-transmit mode.

40. Which 2 options represent Layer 4 addressing?
A. copper UTP b. optical fiber
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Transport
Console

41. 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?
As the commands are entered.
Host A
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
TCP initializes the sequence numbers for the sessions.

42. What info is found in the TCP and UDP header info?
A. Physical b. Data Link
Create signals that represent the bits in each frame for the media.
Source and Destination Ports
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

43. What characteristic of an UTP helps reduce interference?
A. media sharing b. logical topology
A backbone cable.
255.255.255.0
Twisting of the cables

44. After an ethernet collision - which device has priority to transmit data?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Network
Any device whose backoff timer expires first.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

45. When a network service fails - which port is most often used to access a router for management purposes?
A. media sharing b. logical topology
Console
The packets will be delivered and reassembled at destination.
Destination Network Address

46. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. netstat -r b. route PRINT
Host mobility
Network Layer Packet
Switch

47. Which portion of the network layer address does a router use to forward packets?
Router
UDP
Network portion
UTP

48. 3 statements about routes and their use
Next-Hop 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
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
IP is not properly installed

49. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
The address of the router that the host will use to 'get to the other side'.
A. Cat5 UTP b. Cat6 UTP
A. flow control b. session establishment c. numbering and sequencing
MAC

50. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
The packets will be delivered and reassembled at destination.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. performance degradation b. security issues c. host identification
SMB

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CCNA - 2

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