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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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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. 3 characteristics of valid Ethernet Layer 2 addresses
A. Cat5 UTP b. Cat6 UTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. non-deterministic b. less overhead c. collisions exist
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

2. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
A. next-hop b. metric/interface c. destination network address
Supports error detection.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

3. What causes crosstalk within cable pairs when using UTP?
Signal loss can be experienced.
The magnetic field around the adjacent pairs of wire.
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. DB 60 b. Winchester 15-pin c. smart serial

4. 2 functions of encapsulation
A. it has centralized administration b. security is easier to enforce
A. DB 60 b. Winchester 15-pin c. smart serial
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
Twisting of the cables

5. To make a console connection from a comp to a Cisco router - what cable should be used?
Collisions can decrease network performance.
When connecting a host to a switch.
Rollover cable
32 bits

6. 3 common problems w/ a large network
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. performance degradation b. security issues c. host identification
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
No collisions will occur on this link.

7. 3 factors that should be considered when implementing Layer 2 protocols
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
172.16.192.160

8. Why is flow control used for TCP data transfer?
Switch
A. servers b. routers c. network printers
To prevent the receiver from being overwhelmed by incoming data.
To facilitate the entry and exit of data on media.

9. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Window Size
Network address
The physical address is added.

10. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Show Interfaces
Source and Destination Ports
UDP
A. it has centralized administration b. security is easier to enforce

11. What is the proper order of the OSI Layers?
It provides interface between applications on either end of the network.
Time-to-live (TTL)
Static
A. application b. presentation c. session d. transmision e. network f. data link g. physical

12. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. Cat5 UTP b. Cat6 UTP
Window Size
255.255.255.224
0 to 1023

13. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Supports error detection.
A. next-hop b. metric/interface c. destination network address

14. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The physical address is added.
Binary ANDing

15. What command can be used to determine if the router has experienced any input or output errors?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Show Interfaces
A. non-deterministic b. less overhead c. collisions exist
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

16. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
The physical address is added.
Network address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
RJ-45

17. Which device is used to create or divide broadcast domains?
RJ-45
Destination Network Address
Router(config)# interface FastEthernet 0/1
Router

18. What are the advantages of using a client-server model?
Network portion
A. it has centralized administration b. security is easier to enforce
80 (HTTP)
Router

19. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. they initiate data exchanges b. they may upload data to servers
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
172.16.192.160

20. What is dinamically selected by the source host when forwarding data?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. copper UTP b. optical fiber
Source Port
The MAC protocol can be very simple.

21. What info is found in the TCP and UDP header info?
DNS
IP is not properly installed
Source and Destination Ports
A. addressing b. error detection c. frame delimiting

22. What is the role of the OSI Application Layer?
A. application b. services
TCP initializes the sequence numbers for the sessions.
Source and Destination IP address
It provides interface between applications on either end of the network.

23. What is the primary rope of the physical layer in transmitting data?
A. application b. services
Network address
Host mobility
Create signals that represent the bits in each frame for the media.

24. What is an effect of improperly applying a network cable connector?
Console
Show Interfaces
Signal loss can be experienced.
Flash

25. What is the primary purpose of ARP?
Fiber
255.255.255.224
Logical Link Control sublayer
Resolve IPv4 addresses to MAC addresses.

26. What networking devices are recommended to be assigned static IP addresses?
Physical
The magnetic field around the adjacent pairs of wire.
Create signals that represent the bits in each frame for the media.
A. servers b. routers c. network printers

27. Which characteristics describe fiber optic cable?
8
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The MAC protocol can be very simple.

28. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
SMB

29. 2 most commonly used media types in ethernet networks
A. DB 60 b. Winchester 15-pin c. smart serial
Router
A. copper UTP b. optical fiber
80 (HTTP)

30. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
UTP
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
Ctrl + Shift + 6

31. What are 2 forms of application layer software?
Next-Hop Address
A. perform degradation b. security issues c. host identification
A. application b. services
80 (HTTP)

32. When a device is moved from one network to the other...?
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
255.255.255.224
A. servers b. routers c. network printers
Network address

33. What is the purpose of a default gateway?
Collisions can decrease network performance.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
OTDR
Identify the device that allows local network computers to communicate w/ devices in other networks.

34. What is a benefit of a WAN?
Host mobility
Host A
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Access

35. Where is the IOS file stored at?
A. it has centralized administration b. security is easier to enforce
Flash
A. show startup-config b. show running-config
A. netstat -r b. route PRINT

36. What 2 type of cables would most commonly be used for new runs?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It reduces unnecessary broadcasts.
A. Cat5 UTP b. Cat6 UTP
A. larger address space b. data types and classes of service c. authentication and encryption

37. Which 2 options represent Layer 4 addressing?
Wireless
A. identifies the communicating applications b. identifies multiple conversations between the hosts
UTP
Physical

38. Which portion of the network layer address does a router use to forward packets?
A. performance degradation b. security issues c. host identification
Network portion
Any device whose backoff timer expires first.
The MAC protocol can be very simple.

39. What type of routing uses information that is manually entered into the routing table?
32 bits
Static
A. minimizing of collisions b. division into broadcast domains
A. low overhead b. connectionless

40. Important characteristic of UDP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The magnetic field around the adjacent pairs of wire.
Network address
Minimal delays in data delivery.

41. What are key considering factors when grouping hosts into common networks?
172.16.192.160
A. netstat -r b. route PRINT
A. purpose b. geographic location c. ownership
Network

42. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
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
Hosts return to listen-before-transmit mode.
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

43. 3 statements about routes and their use
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. low overhead b. connectionless
A. larger address space b. data types and classes of service c. authentication and encryption
A. DB 60 b. Winchester 15-pin c. smart serial

44. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. flow control b. session establishment c. numbering and sequencing
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
Transport

45. What do the intermediary devices in the network do?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

46. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
DNS
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It uses lasers as the light source.

47. An admin needs to keep contents private - which access method should he use?
8
Wireless
SSH
Static

48. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Console
255.255.255.224
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

49. Which combination of keys can be used to interrupt a ping or traceroute process?
A. non-deterministic b. less overhead c. collisions exist
UTP
Ctrl + Shift + 6
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

50. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Transport
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

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CCNA - 2

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