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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. 3 common problems w/ a large network
Router
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
Binary ANDing
A. performance degradation b. security issues c. host identification

2. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A default gateway (router).

3. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
Destination is not contacted before a packet is sent.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Network Access

4. What is an effect of improperly applying a network cable connector?
To facilitate the entry and exit of data on media.
Signal loss can be experienced.
Network address
Binary ANDing

5. 3 statements about the role of routers in the network
The physical address is added.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Access
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

6. What is a drawback of the CSMA/CD access method?
Window Size
A. copper UTP b. optical fiber
Collisions can decrease network performance.
Rollover cable

7. 2 functions of encapsulation
Wireless
FTP
Binary ANDing
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

8. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
FTP
Network Layer Packet
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

9. What do end devices do?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Originate data flow.
Network
A. media sharing b. logical topology

10. What kind of problems are caused by excessive broadcast traffic on network segments?
A. MTA b. SMTP
Destination is not contacted before a packet is sent.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Identify processes or services that are communicating with end devices.

11. An admin needs to keep contents private - which access method should he use?
SSH
A. larger address space b. data types and classes of service c. authentication and encryption
A. replace a switch w/ a router b. subnet the new networks
Hub

12. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Supports error detection.
A. show startup-config b. show running-config
Router(config)# interface FastEthernet 0/1

13. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Identify processes or services that are communicating with end devices.
A. router b. firewall
Network Layer Packet

14. statements of IP adressing
It provides interface between applications on either end of the network.
OTDR
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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

15. If there is a graphic representation of a company network wiring and equipment - What is this called?
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. they initiate data exchanges b. they may upload data to servers
A physical topology.
A. goodput b. throughput c. bandwidth

16. What makes fiber preferable to copper for interconnecting buildings?
The MAC protocol can be very simple.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
As the commands are entered.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

17. What are 2 forms of application layer software?
A. application b. services
OTDR
A. Cat5 UTP b. Cat6 UTP
Identify processes or services that are communicating with end devices.

18. How many bits make up an IPv4 address?
A default gateway (router).
32 bits
Wireless
A. copper UTP b. optical fiber

19. What is the role of MTA in handling email?
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. DNS b. SMTP c. POP
The destination host address.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

20. 3 features that allow TCP to realibly and accurately track the transmission of data
Binary ANDing
FTP
A. flow control b. session establishment c. numbering and sequencing
No collisions will occur on this link.

21. 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. HTTP b. HTTPS
The destination host address.
Router
Host A

22. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It provides interface between applications on either end of the network.
Logical Link Control sublayer
A. non-deterministic b. less overhead c. collisions exist

23. 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
Identify the device that allows local network computers to communicate w/ devices in other networks.
Resolve IPv4 addresses to MAC addresses.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

24. Which characteristics describe fiber optic cable?
0 to 1023
A. hot keys b. context-sensitive c. command syntax check
UTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling

25. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Source and Destination Ports
Hosts return to listen-before-transmit mode.

26. What device can check for faults - integrity and performance of media?
To facilitate the entry and exit of data on media.
OTDR
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
SMB

27. What are key considering factors when grouping hosts into common networks?
Time-to-live (TTL)
A. purpose b. geographic location c. ownership
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. addressing b. error detection c. frame delimiting

28. What is the primary function of encapsulating packets into frames?
FTP
To facilitate the entry and exit of data on media.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

29. 2 most commonly used media types in ethernet networks
Twisting of the cables
A. MTA b. SMTP
MAC
A. copper UTP b. optical fiber

30. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
A default gateway (router).
Next-Hop Address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

31. What method of signal transmission uses radio waves to carry signals?
Source and Destination Ports
The physical address is added.
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
Wireless

32. What are 3 pieces of info about a route contained in a routing table?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Network Layer
A. DNS b. SMTP c. POP
A. next-hop b. metric/interface c. destination network address

33. There are too many broadcasts on switches - what can be done?
Fiber
A. replace a switch w/ a router b. subnet the new networks
255.255.255.0
A. application b. services

34. What determines the method of media access control?
A. replace a switch w/ a router b. subnet the new networks
The address of the router that the host will use to 'get to the other side'.
A. media sharing b. logical topology
A. not affected by EMI of RFI b. most expensive type of LAN cabling

35. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. non-deterministic b. less overhead c. collisions exist
Console interface

36. What info is found in the TCP and UDP header info?
Source and Destination Ports
Console
A. router b. firewall
The MAC protocol can be very simple.

37. 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?
172.16.192.160
A. show startup-config b. show running-config
Network address
Time-to-live (TTL)

38. 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?
Identify processes or services that are communicating with end devices.
8
Destination Network Address
To prevent the receiver from being overwhelmed by incoming data.

39. What is a characteristic of a single-mode fiber-optic cable?
Destination is not contacted before a packet is sent.
The physical address is added.
It uses lasers as the light source.
Wireless

40. Important characteristic of UDP
A random delay helps prevent the stations from experiencing another collision during transmission.
The address of the router that the host will use to 'get to the other side'.
Resolve IPv4 addresses to MAC addresses.
Minimal delays in data delivery.

41. What are 2 common characteristics associated w/ dynamic routing protocols?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Source and Destination Ports
A. purpose b. geographic location c. ownership

42. What layer encapsulates segments into packets?
SMB
Network Layer
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
Resolve IPv4 addresses to MAC addresses.

43. Where is the IOS file stored at?
A. decentralized resources b. resource sharing w/o a dedicated server
The destination host address.
Flash
Rollover cable

44. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Rollover cable
Network Access

45. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
RJ-45
A. they initiate data exchanges b. they may upload data to servers
A. addressing b. error detection c. frame delimiting

46. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
MAC
32 bits
Flash

47. What causes crosstalk within cable pairs when using UTP?
Network Access
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
2046
The magnetic field around the adjacent pairs of wire.

48. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Hosts return to listen-before-transmit mode.
A. Cat5 UTP b. Cat6 UTP

49. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. application b. services
Network Layer Packet
255.255.255.224
A. larger address space b. data types and classes of service c. authentication and encryption

50. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. perform degradation b. security issues c. host identification
A. non-deterministic b. less overhead c. collisions exist
Network Layer
UDP

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CCNA - 2

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