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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. If you have a small network w/ 3 computers...
32 bits
A. show startup-config b. show running-config
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
2046

2. 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. goodput b. throughput c. bandwidth
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The packets will be delivered and reassembled at destination.

3. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Fiber
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Layer Packet

4. What type of routing uses information that is manually entered into the routing table?
A random delay helps prevent the stations from experiencing another collision during transmission.
Hosts return to listen-before-transmit mode.
Ctrl + Shift + 6
Static

5. Which device is used to create or divide broadcast domains?
Router
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Create signals that represent the bits in each frame for the media.
When connecting a host to a switch.

6. What kind of problems are caused by excessive broadcast traffic on network segments?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. replace a switch w/ a router b. subnet the new networks

7. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
0 to 1023
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
Rollover cable

8. What device can check for faults - integrity and performance of media?
Host mobility
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 physical topology.
OTDR

9. During a TCP session - if packets arrive out of order - what will happen?
Rollover cable
A physical topology.
The packets will be delivered and reassembled at destination.
Hosts return to listen-before-transmit mode.

10. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Hosts return to listen-before-transmit mode.
Network Layer Packet

11. When is a straight-through cable used in a network?
Window Size
When connecting a host to a switch.
OTDR
A. DNS b. SMTP c. POP

12. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. flow control b. session establishment c. numbering and sequencing
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network
A. low overhead b. connectionless

13. What do end devices do?
Originate data flow.
When connecting a host to a switch.
Network portion
UTP

14. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
Rollover cable
Rollover cable
Identify the device that allows local network computers to communicate w/ devices in other networks.

15. When a device is moved from one network to the other...?
A. netstat -r b. route PRINT
A. replace a switch w/ a router b. subnet the new networks
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. 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

16. What info is found in the TCP and UDP header info?
Source and Destination Ports
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. addressing b. error detection c. frame delimiting
A. purpose b. geographic location c. ownership

17. What is a component of a routing table entry?
Next-Hop Address
80 (HTTP)
Wireless
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

18. What causes crosstalk within cable pairs when using UTP?
172.16.192.160
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. decentralized resources b. resource sharing w/o a dedicated server
The magnetic field around the adjacent pairs of wire.

19. What characteristic of an UTP helps reduce interference?
8
Twisting of the cables
0 to 1023
UDP

20. 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
255.255.255.224
A. it has centralized administration b. security is easier to enforce
Collisions can decrease network performance.

21. What can you identify when you examine the Network Layer header?
A. DB 60 b. Winchester 15-pin c. smart serial
The destination host address.
80 (HTTP)
Rollover cable

22. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Any device whose backoff timer expires first.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Flash

23. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
When connecting a host to a switch.
Resolve IPv4 addresses to MAC addresses.

24. If there is a graphic representation of a company network wiring and equipment - What is this called?
The packets will be delivered and reassembled at destination.
A physical topology.
It reduces unnecessary broadcasts.
It provides interface between applications on either end of the network.

25. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. minimizing of collisions b. division into broadcast domains
Application Layer
Window Size
A. Physical b. Data Link

26. In a connectionless system - What is correct?
Router(config)# interface FastEthernet 0/1
Destination is not contacted before a packet is sent.
Console interface
A. MTA b. SMTP

27. During encapsulation - what happens in the Data Link Layer?
A. DB 60 b. Winchester 15-pin c. smart serial
A. performance degradation b. security issues c. host identification
80 (HTTP)
The physical address is added.

28. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Switch
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Transport
UDP

29. If you have a full-duplex operational network - what can happen?
A. low overhead b. connectionless
No collisions will occur on this link.
A. it has centralized administration b. security is easier to enforce
A. flow control b. session establishment c. numbering and sequencing

30. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Console interface
IP is not properly installed
Source and Destination IP address
Rollover cable

31. What is the primary purpose of ARP?
Binary ANDing
Any device whose backoff timer expires first.
Resolve IPv4 addresses to MAC addresses.
A. minimizing of collisions b. division into broadcast domains

32. What statements describe the logical token-passing topology?
It uses lasers as the light source.
A random delay helps prevent the stations from experiencing another collision during transmission.
Source Port
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

33. What is a disadvantage of Telnet?
Source and Destination Ports
It does not support encryption.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
To prevent the receiver from being overwhelmed by incoming data.

34. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
To enable a receiving host to forward the data to the appropriate application.
Router(config)# interface FastEthernet 0/1
2046
A. flow control b. session establishment c. numbering and sequencing

35. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
A. netstat -r b. route PRINT
Ctrl + Shift + 6
TCP initializes the sequence numbers for the sessions.

36. Which combination of keys can be used to interrupt a ping or traceroute process?
A. servers b. routers c. network printers
UDP
Ctrl + Shift + 6
A. MTA b. SMTP

37. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
The physical address is added.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. enable mode b. priviledge executive mode

38. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Wireless
A. enable mode b. priviledge executive mode
MAC

39. What is a characteristic of a single-mode fiber-optic cable?
Wireless
A. Cat5 UTP b. Cat6 UTP
It uses lasers as the light source.
A. they initiate data exchanges b. they may upload data to servers

40. 3 features that allow TCP to realibly and accurately track the transmission of data
A. they initiate data exchanges b. they may upload data to servers
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. flow control b. session establishment c. numbering and sequencing
UTP

41. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Originate data flow.
Physical
Network address
A. enable mode b. priviledge executive mode

42. Intermediary devices used to implement security between networks
Signal loss can be experienced.
A. router b. firewall
A. they initiate data exchanges b. they may upload data to servers
When connecting a host to a switch.

43. When destination network is not in the routing table - What are 2 actions the router might take?
The MAC protocol can be very simple.
To prevent the receiver from being overwhelmed by incoming data.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It uses lasers as the light source.

44. What is the primary purpose of Layer 4?
Show Interfaces
Identify processes or services that are communicating with end devices.
A. copper UTP b. optical fiber
8

45. Which characteristics describe fiber optic cable?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
RJ-45
A. not affected by EMI of RFI b. most expensive type of LAN cabling

46. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Destination Network Address
Flash

47. What are 2 forms of application layer software?
Router(config)# hostname Costas
A. application b. services
8
A. physical layer b. DLL layer

48. After an ethernet collision - which device has priority to transmit data?
Window Size
Network
Any device whose backoff timer expires first.
A. non-deterministic b. less overhead c. collisions exist

49. What are 2 email components used to forward mail between servers?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
UDP
IP is not properly installed
A. MTA b. SMTP

50. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. performance degradation b. security issues c. host identification
Network address
Network portion
Console interface

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CCNA - 2

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