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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 command can be used to determine if the router has experienced any input or output errors?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Show Interfaces
The MAC protocol can be very simple.
Rollover cable

2. 3 terms that define the forms of help available within the Cisco IOS
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. MTA b. SMTP
It uses lasers as the light source.
A. hot keys b. context-sensitive c. command syntax check

3. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
UTP
2046

4. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. low overhead b. connectionless
UDP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

5. What is the role of MTA in handling email?
Is a layer of specific encapsulation.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Source and Destination Ports
Network portion

6. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
The physical address is added.
Minimal delays in data delivery.
Console

7. 2 most commonly used media types in ethernet networks
172.16.192.160
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
A. netstat -r b. route PRINT

8. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Any device whose backoff timer expires first.
It provides interface between applications on either end of the network.
A backbone cable.

9. What statements describe the logical token-passing topology?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network Media Control
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

10. What is an effect of improperly applying a network cable connector?
Fiber
A. larger address space b. data types and classes of service c. authentication and encryption
Signal loss can be experienced.
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

11. Which type of cable is most often associated w/ fiber-optic cable?
IP Protocol
A backbone cable.
Resolve IPv4 addresses to MAC addresses.
A. minimizing of collisions b. division into broadcast domains

12. Which combination of keys can be used to interrupt a ping or traceroute process?
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
It provides interface between applications on either end of the network.
A. application b. services
Ctrl + Shift + 6

13. What information is added during encapsulation at OSI Layer 3?
UTP
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
Source and Destination IP address
Destination is not contacted before a packet is sent.

14. What are 2 commands used to view a host routing table?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
To enable a receiving host to forward the data to the appropriate application.
Destination Network Address
A. netstat -r b. route PRINT

15. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Source Port
Wireless
UDP
Supports error detection.

16. What is a disadvantage of Telnet?
A. DB 60 b. Winchester 15-pin c. smart serial
The magnetic field around the adjacent pairs of wire.
Network Layer
It does not support encryption.

17. What application layer protocol is used to support file transfers between client and server?
A. DNS b. SMTP c. POP
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
Next-Hop Address
FTP

18. Important characteristic of UDP
A. not affected by EMI of RFI b. most expensive type of LAN cabling
UDP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Minimal delays in data delivery.

19. Which characteristics describe fiber optic cable?
It uses lasers as the light source.
A. physical layer b. DLL layer
DNS
A. not affected by EMI of RFI b. most expensive type of LAN cabling

20. Which layer supplies services and allows user interface?
2046
A. DNS b. SMTP c. POP
Application Layer
Network Layer

21. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Static
Originate data flow.
MAC
Show Interfaces

22. 3 facts about the network portion of an IPv4 address
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It does not support encryption.
Router(config)# hostname Costas
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

23. What 2 type of cables would most commonly be used for new runs?
A. flow control b. session establishment c. numbering and sequencing
Originate data flow.
A. Cat5 UTP b. Cat6 UTP
It reduces unnecessary broadcasts.

24. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. DB 60 b. Winchester 15-pin c. smart serial
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Destination is not contacted before a packet is sent.

25. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
A. MTA b. SMTP
A. flow control b. session establishment c. numbering and sequencing
Is used by the server to resolve names.

26. Which 2 options represent Layer 4 addressing?
Hub
Switch
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Physical

27. Which device is used to create or divide broadcast domains?
The packets will be delivered and reassembled at destination.
Router
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
To prevent the receiver from being overwhelmed by incoming data.

28. What is the primary reason for developing IPv6?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. Cat5 UTP b. Cat6 UTP
It has expanded adressing capabilities.
It uses lasers as the light source.

29. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. servers b. routers c. network printers
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

30. Which portion of the network layer address does a router use to forward packets?
Network portion
A. replace a switch w/ a router b. subnet the new networks
172.16.192.160
Switch

31. At which layer of the TCP/IP model does ethernet operate?
Network Access
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
The magnetic field around the adjacent pairs of wire.
To prevent the receiver from being overwhelmed by incoming data.

32. What characteristic of an UTP helps reduce interference?
Twisting of the cables
The magnetic field around the adjacent pairs of wire.
Any device whose backoff timer expires first.
2046

33. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Time-to-live (TTL)
Host A

34. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
A. router b. firewall
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
It does not support encryption.

35. 3 features that allow TCP to realibly and accurately track the transmission of data
To facilitate the entry and exit of data on media.
80 (HTTP)
A. flow control b. session establishment c. numbering and sequencing
Flash

36. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
Static
8
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

37. What is an automated service that matches resource names w/ required IP addresses?
A. router b. firewall
OTDR
DNS
Twisting of the cables

38. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Destination Network Address
Physical
It uses lasers as the light source.
A random delay helps prevent the stations from experiencing another collision during transmission.

39. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Minimal delays in data delivery.
Router(config)# interface FastEthernet 0/1
A. MTA b. SMTP
A. servers b. routers c. network printers

40. 3 primary functions of the data link layer encapsulation
Resolve IPv4 addresses to MAC addresses.
A. addressing b. error detection c. frame delimiting
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Twisting of the cables

41. After an ethernet collision - which device has priority to transmit data?
Hub
Any device whose backoff timer expires first.
Originate data flow.
Signal loss can be experienced.

42. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Network portion
255.255.255.0
The physical address is added.
A. purpose b. geographic location c. ownership

43. What is dinamically selected by the source host when forwarding data?
Network Access
A. goodput b. throughput c. bandwidth
Source Port
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

44. What makes fiber preferable to copper for interconnecting buildings?
Physical
UTP
The destination host address.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

45. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. router b. firewall
Minimal delays in data delivery.

46. 3 common problems w/ a large network
A. show startup-config b. show running-config
A. performance degradation b. security issues c. host identification
Network portion
Is used by the server to resolve names.

47. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
It reduces unnecessary broadcasts.
Hub
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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

48. What event occurs during the 3-way handshake?
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
TCP initializes the sequence numbers for the sessions.
To facilitate the entry and exit of data on media.
Source and Destination IP address

49. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
Hosts return to listen-before-transmit mode.
Console
A. flow control b. session establishment c. numbering and sequencing

50. What is the function of the DLL?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It provides for the exchange of data over a common local media.
It reduces unnecessary broadcasts.
DNS

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CCNA - 2

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