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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. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Next-Hop Address
The physical address is added.
0 to 1023
Physical

2. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
It reduces unnecessary broadcasts.
A. physical layer b. DLL layer
Transport
Physical

3. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Binary ANDing
A. next-hop b. metric/interface c. destination network address

4. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
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
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. addressing b. error detection c. frame delimiting

5. Intermediary devices used to implement security between networks
A. replace a switch w/ a router b. subnet the new networks
A. router b. firewall
A. hot keys b. context-sensitive c. command syntax check
0 to 1023

6. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Show Interfaces
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network Layer

7. What is the primary reason for developing IPv6?
The magnetic field around the adjacent pairs of wire.
172.16.192.160
It has expanded adressing capabilities.
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

8. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. router b. firewall
They must wait until the first hosts finish transfering the media.
A. next-hop b. metric/interface c. destination network address

9. Where is the IOS file stored at?
Application Layer
Flash
A. larger address space b. data types and classes of service c. authentication and encryption
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

10. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Hub
It does not support encryption.

11. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
It uses support from the lower layers to distinguish between connections to the service.
SMB
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Router

12. 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
Source and Destination IP address
FTP
8

13. 3 facts about the network portion of an IPv4 address
Console interface
A. larger address space b. data types and classes of service c. authentication and encryption
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

14. What type of network cable is used between a terminal and a console port?
255.255.255.0
Network Layer Packet
FTP
Rollover cable

15. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Source Port
A. replace a switch w/ a router b. subnet the new networks

16. What is a component of a routing table entry?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Identify the device that allows local network computers to communicate w/ devices in other networks.
Logical Link Control sublayer
Next-Hop Address

17. Important characteristic of UDP
0 to 1023
A. netstat -r b. route PRINT
No collisions will occur on this link.
Minimal delays in data delivery.

18. What is the purpose of resource records in DNS?
Supports error detection.
A. HTTP b. HTTPS
Network address
Is used by the server to resolve names.

19. When a device is moved from one network to the other...?
Collisions can decrease network performance.
A random delay helps prevent the stations from experiencing another collision during transmission.
Transport
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

20. What are 3 pieces of info about a route contained in a routing table?
Show Interfaces
Wireless
FTP
A. next-hop b. metric/interface c. destination network address

21. What is the proper order of the OSI Layers?
Flash
Supports error detection.
Host A
A. application b. presentation c. session d. transmision e. network f. data link g. physical

22. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A backbone cable.
A. flow control b. session establishment c. numbering and sequencing
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

23. What kind of problems are caused by excessive broadcast traffic on network segments?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Signal loss can be experienced.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
80 (HTTP)

24. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
Network Media Control
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Source and Destination Ports

25. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. show startup-config b. show running-config
Console
Host A

26. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
A. netstat -r b. route PRINT
Switch
A. application b. services

27. Which combination of keys can be used to interrupt a ping or traceroute process?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Ctrl + Shift + 6
UTP
A. router b. firewall

28. What do end devices do?
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
Fiber
Originate data flow.
255.255.255.224

29. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A random delay helps prevent the stations from experiencing another collision during transmission.
Any device whose backoff timer expires first.
When connecting a host to a switch.

30. What do you need to use for an initial configuration on a Cisco router?
172.16.192.160
Originate data flow.
Console interface
MAC

31. If you have a small network w/ 3 computers...
A. flow control b. session establishment c. numbering and sequencing
It provides for the exchange of data over a common local media.
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
Create signals that represent the bits in each frame for the media.

32. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The physical address is added.
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. purpose b. geographic location c. ownership

33. What application layer protocol is used to support file transfers between client and server?
FTP
The MAC protocol can be very simple.
Host mobility
Identify the device that allows local network computers to communicate w/ devices in other networks.

34. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
Console
No collisions will occur on this link.
Is used by the server to resolve names.

35. What are 2 commands used to view a host routing table?
When connecting a host to a switch.
Console interface
2046
A. netstat -r b. route PRINT

36. What characteristic of an UTP helps reduce interference?
SMB
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Twisting of the cables
Host A

37. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
MAC
A. low overhead b. connectionless
A. they initiate data exchanges b. they may upload data to servers

38. 3 statements of media acess control
When connecting a host to a switch.
A. enable mode b. priviledge executive mode
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
Physical

39. When is a straight-through cable used in a network?
The MAC protocol can be very simple.
When connecting a host to a switch.
Network Media Control
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

40. 2 features that make switches preferable to hubs
The physical address is added.
Next-Hop Address
A. minimizing of collisions b. division into broadcast domains
Originate data flow.

41. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. servers b. routers c. network printers
Network address
Network
A. Physical b. Data Link

42. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Rollover cable
SMB
A. Cat5 UTP b. Cat6 UTP

43. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
OTDR
32 bits
Signal loss can be experienced.

44. 3 primary functions of the data link layer encapsulation
The destination host address.
Host A
RJ-45
A. addressing b. error detection c. frame delimiting

45. Why is flow control used for TCP data transfer?
Network portion
No collisions will occur on this link.
Network address
To prevent the receiver from being overwhelmed by incoming data.

46. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The destination host address.
A. perform degradation b. security issues c. host identification

47. Which portion of the network layer address does a router use to forward packets?
Network portion
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. larger address space b. data types and classes of service c. authentication and encryption
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

48. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. router b. firewall
They must wait until the first hosts finish transfering the media.
Hosts return to listen-before-transmit mode.
255.255.255.224

49. What is a default gateway address?

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50. What is the primary purpose of Layer 4?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Router(config)# hostname Costas
Identify processes or services that are communicating with end devices.
Network Access

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CCNA - 2

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