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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. Which layer supplies services and allows user interface?
A. hot keys b. context-sensitive c. command syntax check
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Create signals that represent the bits in each frame for the media.
Application Layer

2. What can be a problem that is reduced by adding end-to-end addressing?
Network Media Control
It reduces unnecessary broadcasts.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

3. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A. identifies the communicating applications b. identifies multiple conversations between the hosts
When connecting a host to a switch.
Show Interfaces

4. What kind of problems are caused by excessive broadcast traffic on network segments?
A. perform degradation b. security issues c. host identification
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. next-hop b. metric/interface c. destination network address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

5. When destination network is not in the routing table - What are 2 actions the router might take?
A. addressing b. error detection c. frame delimiting
A. physical layer b. DLL layer
A. they initiate data exchanges b. they may upload data to servers
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

6. What information is added during encapsulation at OSI Layer 3?
2046
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Source and Destination IP address

7. What is an effect of improperly applying a network cable connector?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
FTP
Signal loss can be experienced.
Router(config)# hostname Costas

8. 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?
It provides for the exchange of data over a common local media.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
2046
Show Interfaces

9. An admin needs to keep contents private - which access method should he use?
A. performance degradation b. security issues c. host identification
A. router b. firewall
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

10. There are too many broadcasts on switches - what can be done?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. replace a switch w/ a router b. subnet the new networks
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It uses support from the lower layers to distinguish between connections to the service.

11. Which portion of the network layer address does a router use to forward packets?
A. MTA b. SMTP
Network portion
Destination is not contacted before a packet is sent.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

12. How many bits make up an IPv4 address?
32 bits
DNS
When connecting a host to a switch.
Resolve IPv4 addresses to MAC addresses.

13. Intermediary devices used to implement security between networks
The magnetic field around the adjacent pairs of wire.
Physical
IP is not properly installed
A. router b. firewall

14. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
No collisions will occur on this link.
A. router b. firewall
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

15. If you have a full-duplex operational network - what can happen?
Network address
Hosts return to listen-before-transmit mode.
A. goodput b. throughput c. bandwidth
No collisions will occur on this link.

16. What is the primary reason for developing IPv6?
It uses support from the lower layers to distinguish between connections to the service.
It uses lasers as the light source.
It has expanded adressing capabilities.
A backbone cable.

17. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Router(config)# hostname Costas
Console
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A random delay helps prevent the stations from experiencing another collision during transmission.

18. What event occurs during the 3-way handshake?
A. purpose b. geographic location c. ownership
It uses lasers as the light source.
Switch
TCP initializes the sequence numbers for the sessions.

19. Which 2 options represent Layer 4 addressing?
Static
To prevent the receiver from being overwhelmed by incoming data.
Switch
A. identifies the communicating applications b. identifies multiple conversations between the hosts

20. What is a benefit of a WAN?
Host mobility
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The MAC protocol can be very simple.

21. What layer encapsulates segments into packets?
Any device whose backoff timer expires first.
Network Layer
A. they initiate data exchanges b. they may upload data to servers
Network address

22. What networking devices are recommended to be assigned static IP addresses?
A. Cat5 UTP b. Cat6 UTP
A. servers b. routers c. network printers
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

23. What command can be used to determine if the router has experienced any input or output errors?
FTP
Show Interfaces
A. goodput b. throughput c. bandwidth
Any device whose backoff timer expires first.

24. When a device is moved from one network to the other...?
It provides interface between applications on either end of the network.
The packets will be delivered and reassembled at destination.
A. servers b. routers c. network printers
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

25. 3 characteristics of valid Ethernet Layer 2 addresses
To facilitate the entry and exit of data on media.
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. minimizing of collisions b. division into broadcast domains
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

26. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
To facilitate the entry and exit of data on media.
Router
Network Layer Packet
A. netstat -r b. route PRINT

27. 3 statements about the role of routers in the network
Signal loss can be experienced.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. application b. services

28. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
A. copper UTP b. optical fiber
Logical Link Control sublayer
Minimal delays in data delivery.

29. What is a disadvantage of Telnet?
They must wait until the first hosts finish transfering the media.
Source and Destination IP address
UTP
It does not support encryption.

30. What is the primary rope of the physical layer in transmitting data?
A. application b. services
A. goodput b. throughput c. bandwidth
Switch
Create signals that represent the bits in each frame for the media.

31. 2 characteristics of clients in data networks
Destination Network Address
A. they initiate data exchanges b. they may upload data to servers
A. DB 60 b. Winchester 15-pin c. smart serial
Network Layer Packet

32. What do the intermediary devices in the network do?
The address of the router that the host will use to 'get to the other side'.
255.255.255.0
Rollover cable
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

33. 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. they initiate data exchanges b. they may upload data to servers
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. physical layer b. DLL layer
A. identifies the communicating applications b. identifies multiple conversations between the hosts

34. What are 2 features of User Diagram Protocol (UDP)?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. low overhead b. connectionless
Switch
Transport

35. 2 features that make switches preferable to hubs
Network Access
A. minimizing of collisions b. division into broadcast domains
A. next-hop b. metric/interface c. destination network address
A. the router will discard the packet b. the router will send a time exceeded message to the source host

36. 3 terms that define the forms of help available within the Cisco IOS
Flash
When connecting a host to a switch.
A. hot keys b. context-sensitive c. command syntax check
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

37. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
The address of the router that the host will use to 'get to the other side'.
Window Size
It provides for the exchange of data over a common local media.
A. Cat5 UTP b. Cat6 UTP

38. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
DNS
Host A
Network Media Control

39. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
0 to 1023
OTDR
Ctrl + Shift + 6

40. What do end devices do?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Originate data flow.
The physical address is added.
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

41. What is the role of the OSI Application Layer?
Network portion
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It provides interface between applications on either end of the network.
Rollover cable

42. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Rollover cable
Network Access
UTP
Switch

43. What is the purpose of the TCP/IP Network Application Layer?
Supports error detection.
Network Media Control
As the commands are entered.
Flash

44. What are 3 pieces of info about a route contained in a routing table?
A. media sharing b. logical topology
A. next-hop b. metric/interface c. destination network address
A. larger address space b. data types and classes of service c. authentication and encryption
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

45. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. application b. services
Binary ANDing
It provides interface between applications on either end of the network.

46. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. replace a switch w/ a router b. subnet the new networks
A. larger address space b. data types and classes of service c. authentication and encryption
Console interface

47. 3 statements about routes and their use
Network Media Control
A. goodput b. throughput c. bandwidth
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
IP is not properly installed

48. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Minimal delays in data delivery.
It has expanded adressing capabilities.

49. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
It provides for the exchange of data over a common local media.
MAC
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. application b. presentation c. session d. transmision e. network f. data link g. physical

50. What device can check for faults - integrity and performance of media?
RJ-45
The physical address is added.
OTDR
0 to 1023

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CCNA - 2

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