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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 are 2 forms of application layer software?
Network Layer
Wireless
A. application b. services
It has expanded adressing capabilities.

2. What correctly describes a MAC address?
Physical
Static
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

3. 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
Supports error detection.
RJ-45
A. servers b. routers c. network printers
A. the router will discard the packet b. the router will send a time exceeded message to the source host

4. 3 measures of data transfer
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. goodput b. throughput c. bandwidth
Create signals that represent the bits in each frame for the media.
Ctrl + Shift + 6

5. What is the proper order of the OSI Layers?
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
Fiber
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

6. During encapsulation - what happens in the Data Link Layer?
255.255.255.0
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
The physical address is added.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

7. What info is found in the TCP and UDP header info?
Console interface
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
Source and Destination Ports
Application Layer

8. What is an automated service that matches resource names w/ required IP addresses?
A physical topology.
A. non-deterministic b. less overhead c. collisions exist
DNS
Console

9. What is dinamically selected by the source host when forwarding data?
Source Port
Resolve IPv4 addresses to MAC addresses.
Ctrl + Shift + 6
Router

10. What method of signal transmission uses radio waves to carry signals?
It uses support from the lower layers to distinguish between connections to the service.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Wireless
Logical Link Control sublayer

11. 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?
A. application b. services
Source and Destination IP address
A. flow control b. session establishment c. numbering and sequencing
Host A

12. What is a disadvantage of Telnet?
Network address
Transport
It does not support encryption.
Switch

13. What type of routing uses information that is manually entered into the routing table?
Static
Hosts return to listen-before-transmit mode.
A. purpose b. geographic location c. ownership
A. servers b. routers c. network printers

14. What kind of problems are caused by excessive broadcast traffic on network segments?
When connecting a host to a switch.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
172.16.192.160
Logical Link Control sublayer

15. What is the primary function of encapsulating packets into frames?
Physical
A random delay helps prevent the stations from experiencing another collision during transmission.
To facilitate the entry and exit of data on media.
Switch

16. When a network service fails - which port is most often used to access a router for management purposes?
Console
A. non-deterministic b. less overhead c. collisions exist
A. decentralized resources b. resource sharing w/o a dedicated server
Destination is not contacted before a packet is sent.

17. What command is used to change the default name to 'Costas'?
SMB
Flash
A. HTTP b. HTTPS
Router(config)# hostname Costas

18. What device can check for faults - integrity and performance of media?
MAC
OTDR
Network portion
Network Access

19. What 2 type of cables would most commonly be used for new runs?
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. Cat5 UTP b. Cat6 UTP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It does not support encryption.

20. 3 statements about routes and their use
Logical Link Control sublayer
The destination host address.
A. show startup-config b. show running-config
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

21. 2 characteristics of clients in data networks
Network Layer Packet
A. they initiate data exchanges b. they may upload data to servers
80 (HTTP)
Transport

22. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. purpose b. geographic location c. ownership
A. copper UTP b. optical fiber
When connecting a host to a switch.
Physical

23. What is a characteristic of a single-mode fiber-optic cable?
Is used by the server to resolve names.
It uses lasers as the light source.
A physical topology.
Router(config)# hostname Costas

24. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. router b. firewall
80 (HTTP)
Network Layer

25. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
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
UDP
SSH
Network Media Control

26. Statements that describe LAN
Wireless
Supports error detection.
Identify processes or services that are communicating with end devices.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

27. What characteristic of an UTP helps reduce interference?
When connecting a host to a switch.
As the commands are entered.
Twisting of the cables
UTP

28. What statements describe the logical token-passing topology?
Destination Network Address
32 bits
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Time-to-live (TTL)

29. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
A. low overhead b. connectionless
A. flow control b. session establishment c. numbering and sequencing
255.255.255.224
They must wait until the first hosts finish transfering the media.

30. What application layer protocol is used to support file transfers between client and server?
MAC
FTP
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Application Layer

31. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Collisions can decrease network performance.
RJ-45
A physical topology.
Destination Network Address

32. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
32 bits
Fiber
The address of the router that the host will use to 'get to the other side'.

33. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Switch
Hosts return to listen-before-transmit mode.
It uses support from the lower layers to distinguish between connections to the service.
Is a layer of specific encapsulation.

34. At which layer of the TCP/IP model does ethernet operate?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Access
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
Host mobility

35. statements of IP adressing
It has expanded adressing capabilities.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
8
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

36. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
To facilitate the entry and exit of data on media.
A. performance degradation b. security issues c. host identification
RJ-45

37. 2 features that make switches preferable to hubs
A. it has centralized administration b. security is easier to enforce
0 to 1023
80 (HTTP)
A. minimizing of collisions b. division into broadcast domains

38. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. replace a switch w/ a router b. subnet the new networks
Logical Link Control sublayer
Time-to-live (TTL)
A physical topology.

39. What is the role of the OSI Application Layer?
Window Size
A. copper UTP b. optical fiber
It provides interface between applications on either end of the network.
TCP initializes the sequence numbers for the sessions.

40. What is a characteristic of a logical point-to-point topology?
Is a layer of specific encapsulation.
The MAC protocol can be very simple.
A. servers b. routers c. network printers
Signal loss can be experienced.

41. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
A physical topology.
80 (HTTP)
Window Size

42. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
SMB
A. copper UTP b. optical fiber
A. show startup-config b. show running-config

43. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Fiber
A. performance degradation b. security issues c. host identification

44. If you have a full-duplex operational network - what can happen?
The physical address is added.
No collisions will occur on this link.
A. physical layer b. DLL layer
0 to 1023

45. 3 primary functions of the data link layer encapsulation
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
SMB
A. addressing b. error detection c. frame delimiting
TCP initializes the sequence numbers for the sessions.

46. What are 2 commands used to view a host routing table?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. netstat -r b. route PRINT
Ctrl + Shift + 6
A. flow control b. session establishment c. numbering and sequencing

47. 2 most commonly used media types in ethernet networks
Binary ANDing
A. copper UTP b. optical fiber
Next-Hop Address
IP is not properly installed

48. What information is added during encapsulation at OSI Layer 3?
Minimal delays in data delivery.
A. decentralized resources b. resource sharing w/o a dedicated server
A. HTTP b. HTTPS
Source and Destination IP address

49. What makes fiber preferable to copper for interconnecting buildings?
The address of the router that the host will use to 'get to the other side'.
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
0 to 1023

50. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
It reduces unnecessary broadcasts.
172.16.192.160
The packets will be delivered and reassembled at destination.

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CCNA - 2

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