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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. 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
Resolve IPv4 addresses to MAC addresses.
255.255.255.0
A. DB 60 b. Winchester 15-pin c. smart serial
A. the router will discard the packet b. the router will send a time exceeded message to the source host

2. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. servers b. routers c. network printers
To prevent the receiver from being overwhelmed by incoming data.
OTDR

3. 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?
2046
The address of the router that the host will use to 'get to the other side'.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
SMB

4. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. show startup-config b. show running-config
A. non-deterministic b. less overhead c. collisions exist
A. next-hop b. metric/interface c. destination network address

5. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Resolve IPv4 addresses to MAC addresses.
Identify processes or services that are communicating with end devices.
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 Media Control

6. 3 terms that define the forms of help available within the Cisco IOS
UTP
A. addressing b. error detection c. frame delimiting
A. hot keys b. context-sensitive c. command syntax check
A. media sharing b. logical topology

7. What do the intermediary devices in the network do?
Switch
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Network address
Binary ANDing

8. What is a protocol that provides connectionless network layer services?
Flash
Transport
IP Protocol
Destination Network Address

9. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. Cat5 UTP b. Cat6 UTP
A. physical layer b. DLL layer
Supports error detection.

10. What are 3 pieces of info about a route contained in a routing table?
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. MTA b. SMTP
Logical Link Control sublayer
A. next-hop b. metric/interface c. destination network address

11. Which IP packet field will prevent endless loops?
Create signals that represent the bits in each frame for the media.
The destination host address.
Network address
Time-to-live (TTL)

12. If you have a small network w/ 3 computers...
Window Size
Host A
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. addressing b. error detection c. frame delimiting

13. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
Physical
It has expanded adressing capabilities.
Logical Link Control sublayer

14. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. DB 60 b. Winchester 15-pin c. smart serial
A. MTA b. SMTP
Switch

15. What is the proper order of the OSI Layers?
The MAC protocol can be very simple.
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. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. application b. presentation c. session d. transmision e. network f. data link g. physical

16. After an ethernet collision - which device has priority to transmit data?
Collisions can decrease network performance.
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. enable mode b. priviledge executive mode
Any device whose backoff timer expires first.

17. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Next-Hop 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
Network Layer

18. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Collisions can decrease network performance.
A. physical layer b. DLL layer
255.255.255.0
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

19. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. hot keys b. context-sensitive c. command syntax check
Static
Fiber

20. What are 2 email components used to forward mail between servers?
When connecting a host to a switch.
80 (HTTP)
Logical Link Control sublayer
A. MTA b. SMTP

21. 3 statements of media acess control
Fiber
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
Show Interfaces
A. not affected by EMI of RFI b. most expensive type of LAN cabling

22. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Hosts return to listen-before-transmit mode.
A. MTA b. SMTP
A. purpose b. geographic location c. ownership

23. What describes the purpose of default route?
It has expanded adressing capabilities.
Hub
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
As the commands are entered.

24. What info is found in the TCP and UDP header info?
To facilitate the entry and exit of data on media.
Network Media Control
Network Access
Source and Destination Ports

25. What is the primary reason for developing IPv6?
Signal loss can be experienced.
Fiber
It has expanded adressing capabilities.
Network Layer Packet

26. What type of network cable is used between a terminal and a console port?
Flash
Rollover cable
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
They must wait until the first hosts finish transfering the media.

27. During encapsulation - what happens in the Data Link Layer?
A. show startup-config b. show running-config
Flash
The physical address is added.
A. perform degradation b. security issues c. host identification

28. What are 2 commands used to view a host routing table?
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
A. netstat -r b. route PRINT
No collisions will occur on this link.

29. What device can check for faults - integrity and performance of media?
A. HTTP b. HTTPS
The destination host address.
It uses support from the lower layers to distinguish between connections to the service.
OTDR

30. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. they initiate data exchanges b. they may upload data to servers
A. MTA b. SMTP
UTP
Destination Network Address

31. 3 features of IPv6
Any device whose backoff timer expires first.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. larger address space b. data types and classes of service c. authentication and encryption
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

32. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. larger address space b. data types and classes of service c. authentication and encryption
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
IP is not properly installed

33. Important characteristic of UDP
Physical
A. perform degradation b. security issues c. host identification
A. performance degradation b. security issues c. host identification
Minimal delays in data delivery.

34. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Collisions can decrease network performance.
A. decentralized resources b. resource sharing w/o a dedicated server
MAC
Show Interfaces

35. When a device is moved from one network to the other...?
SSH
FTP
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
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

36. What event occurs during the 3-way handshake?
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
A. netstat -r b. route PRINT
TCP initializes the sequence numbers for the sessions.
Logical Link Control sublayer

37. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. purpose b. geographic location c. ownership
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. router b. firewall

38. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Binary ANDing
Transport

39. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Destination Network Address
The packets will be delivered and reassembled at destination.
SMB
A. identifies the communicating applications b. identifies multiple conversations between the hosts

40. 3 properties of peer-2-peer applications
Identify processes or services that are communicating with end devices.
32 bits
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
Host A

41. What is an automated service that matches resource names w/ required IP addresses?
To enable a receiving host to forward the data to the appropriate application.
Router
A. replace a switch w/ a router b. subnet the new networks
DNS

42. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
The MAC protocol can be very simple.
IP is not properly installed
UTP
255.255.255.224

43. 2 characteristics of clients in data networks
8
A. they initiate data exchanges b. they may upload data to servers
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
Any device whose backoff timer expires first.

44. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. minimizing of collisions b. division into broadcast domains
Any device whose backoff timer expires first.
80 (HTTP)

45. How does the application layer on a server process multiple client requests for services?
A default gateway (router).
It uses support from the lower layers to distinguish between connections to the service.
A. hot keys b. context-sensitive c. command syntax check
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

46. To make a console connection from a comp to a Cisco router - what cable should be used?
A. minimizing of collisions b. division into broadcast domains
A backbone cable.
A default gateway (router).
Rollover cable

47. What do you need to use for an initial configuration on a Cisco router?
Console interface
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Application Layer
A backbone cable.

48. 2 characteristics of peer-2-peer
A. netstat -r b. route PRINT
SSH
Is used by the server to resolve names.
A. decentralized resources b. resource sharing w/o a dedicated server

49. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
It does not support encryption.
Fiber
Hosts return to listen-before-transmit mode.
Binary ANDing

50. What does the IEEE 802.2 standard represent in Ethernet technologies?
A physical topology.
Console
Logical Link Control sublayer
Source Port

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CCNA - 2

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