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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. What is a default gateway address?

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2. How does the application layer on a server process multiple client requests for services?
It uses lasers as the light source.
Host mobility
It uses support from the lower layers to distinguish between connections to the service.
UDP

3. 3 characteristics of valid Ethernet Layer 2 addresses
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
FTP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

4. When destination network is not in the routing table - What are 2 actions the router might take?
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry
255.255.255.0
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

5. What 2 type of cables would most commonly be used for new runs?
A physical topology.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. Cat5 UTP b. Cat6 UTP

6. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Flash
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
IP is not properly installed
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

7. Which device is used to create or divide broadcast domains?
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
Router
Binary ANDing
It has expanded adressing capabilities.

8. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. DNS b. SMTP c. POP
It uses lasers as the light source.
Binary ANDing
A. Physical b. Data Link

9. Intermediary devices used to implement security between networks
Switch
Create signals that represent the bits in each frame for the media.
A. router b. firewall
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

10. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Originate data flow.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
0 to 1023
Supports error detection.

11. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
IP is not properly installed
Wireless
A. addressing b. error detection c. frame delimiting
Supports error detection.

12. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
It provides interface between applications on either end of the network.
Source Port
80 (HTTP)

13. What information is added during encapsulation at OSI Layer 3?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Any device whose backoff timer expires first.
Source and Destination IP address
UTP

14. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A backbone cable.
255.255.255.0
80 (HTTP)
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

15. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
The MAC protocol can be very simple.
Destination Network Address
8

16. What layer encapsulates segments into packets?
Network Layer
Originate data flow.
A. low overhead b. connectionless
A. decentralized resources b. resource sharing w/o a dedicated server

17. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
255.255.255.0
It uses support from the lower layers to distinguish between connections to the service.
The magnetic field around the adjacent pairs of wire.

18. What application layer protocol is used to support file transfers between client and server?
FTP
Console
Any device whose backoff timer expires first.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

19. 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.
32 bits
Next-Hop Address

20. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. low overhead b. connectionless
They must wait until the first hosts finish transfering the media.
Network address
It provides interface between applications on either end of the network.

21. What is dinamically selected by the source host when forwarding data?
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.
Host A
Source Port

22. What connectors are commonly associated w/ Cisco's V.35 serial cables?
TCP initializes the sequence numbers for the sessions.
A. perform degradation b. security issues c. host identification
Flash
A. DB 60 b. Winchester 15-pin c. smart serial

23. Network Protocols
A. enable mode b. priviledge executive mode
80 (HTTP)
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Rollover cable

24. What is an effect of improperly applying a network cable connector?
Binary ANDing
A physical topology.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Signal loss can be experienced.

25. What are 2 forms of application layer software?
A. application b. services
2046
A. show startup-config b. show running-config
Destination Network Address

26. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Minimal delays in data delivery.
Logical Link Control sublayer
A default gateway (router).

27. What command is used to change the default name to 'Costas'?
Console
Router(config)# hostname Costas
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Wireless

28. 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. show startup-config b. show running-config
Minimal delays in data delivery.
It uses support from the lower layers to distinguish between connections to the service.
Originate data flow.

29. What info is found in the TCP and UDP header info?
A. show startup-config b. show running-config
RJ-45
Originate data flow.
Source and Destination Ports

30. 3 features that allow TCP to realibly and accurately track the transmission of data
255.255.255.224
SMB
When connecting a host to a switch.
A. flow control b. session establishment c. numbering and sequencing

31. 2 characteristics of clients in data networks
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. they initiate data exchanges b. they may upload data to servers
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
Twisting of the cables

32. What is PDU?
Is a layer of specific encapsulation.
It reduces unnecessary broadcasts.
A random delay helps prevent the stations from experiencing another collision during transmission.
They must wait until the first hosts finish transfering the media.

33. When do changes take effect in a Cisco router?
To prevent the receiver from being overwhelmed by incoming data.
A. purpose b. geographic location c. ownership
As the commands are entered.
Binary ANDing

34. What is a drawback of the CSMA/CD access method?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Source and Destination Ports
Collisions can decrease network performance.
Destination is not contacted before a packet is sent.

35. 3 statements about routes and their use
A. it has centralized administration b. security is easier to enforce
Console interface
OTDR
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

36. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. show startup-config b. show running-config
A. perform degradation b. security issues c. host identification
The physical address is added.

37. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
They must wait until the first hosts finish transfering the media.
SSH
Fiber
A default gateway (router).

38. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Application Layer
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Hosts return to listen-before-transmit mode.
172.16.192.160

39. Default Gateway is incorrect on the host - What is the impact on the communications?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Create signals that represent the bits in each frame for the media.
A. copper UTP b. optical fiber

40. What is an automated service that matches resource names w/ required IP addresses?
IP Protocol
Any device whose backoff timer expires first.
The MAC protocol can be very simple.
DNS

41. Important characteristic of UDP
Minimal delays in data delivery.
Originate data flow.
MAC
Network Media Control

42. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
Destination Network Address
When connecting a host to a switch.
Hosts return to listen-before-transmit mode.

43. 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?
Console
Resolve IPv4 addresses to MAC addresses.
Host A
0 to 1023

44. 3 functions of the upper data link sublayer in the OSI model
The destination host address.
A. netstat -r b. route PRINT
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 discards the packet b. router forwards the packet out the interface indicated in the route entry

45. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
To enable a receiving host to forward the data to the appropriate application.
UTP
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Wireless

46. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Fiber
A. router b. firewall

47. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
The destination host address.
A. purpose b. geographic location c. ownership
Destination Network Address

48. What is a protocol that provides connectionless network layer services?
A. enable mode b. priviledge executive mode
A. show startup-config b. show running-config
IP Protocol
Is a layer of specific encapsulation.

49. When is a straight-through cable used in a network?
When connecting a host to a switch.
No collisions will occur on this link.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. they initiate data exchanges b. they may upload data to servers

50. 3 statements about the role of routers in the network
Hub
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Identify processes or services that are communicating with end devices.
Rollover cable

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CCNA - 2

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