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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 is an automated service that matches resource names w/ required IP addresses?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
DNS
A. application b. presentation c. session d. transmision e. network f. data link g. physical

2. 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
A. the router will discard the packet b. the router will send a time exceeded message to the source host
RJ-45
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Router(config)# interface FastEthernet 0/1

3. 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?
8
The physical address is added.
Source Port
A. show startup-config b. show running-config

4. 3 protocols that operate in the application layer
To enable a receiving host to forward the data to the appropriate application.
A. DNS b. SMTP c. POP
It provides interface between applications on either end of the network.
Network Access

5. What method of signal transmission uses radio waves to carry signals?
Is used by the server to resolve names.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Logical Link Control sublayer
Wireless

6. 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?
Network address
It does not support encryption.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
172.16.192.160

7. What determines the method of media access control?
A. media sharing b. logical topology
Destination Network Address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

8. What 2 type of cables would most commonly be used for new runs?
Network address
A. flow control b. session establishment c. numbering and sequencing
8
A. Cat5 UTP b. Cat6 UTP

9. What is the primary purpose of ARP?
Window Size
Resolve IPv4 addresses to MAC addresses.
It does not support encryption.
Logical Link Control sublayer

10. What is a disadvantage of Telnet?
Create signals that represent the bits in each frame for the media.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It does not support encryption.
Destination Network Address

11. What layer encapsulates segments into packets?
Supports error detection.
Flash
Network Layer
A. purpose b. geographic location c. ownership

12. What type of routing uses information that is manually entered into the routing table?
A. show startup-config b. show running-config
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Router(config)# hostname Costas
Static

13. There are too many broadcasts on switches - what can be done?
It provides for the exchange of data over a common local media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. replace a switch w/ a router b. subnet the new networks

14. Intermediary devices used to implement security between networks
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. router b. firewall
Logical Link Control sublayer
A random delay helps prevent the stations from experiencing another collision during transmission.

15. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
As the commands are entered.
A. netstat -r b. route PRINT
MAC

16. 3 factors that should be considered when implementing Layer 2 protocols
Application Layer
Physical
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Collisions can decrease network performance.

17. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Network Layer
Next-Hop Address
UDP
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

18. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Collisions can decrease network performance.
A. Cat5 UTP b. Cat6 UTP
Destination is not contacted before a packet is sent.

19. 3 characteristics of valid Ethernet Layer 2 addresses
Signal loss can be experienced.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Window Size
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. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
2046
A. DNS b. SMTP c. POP
A. DB 60 b. Winchester 15-pin c. smart serial
Physical

21. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Is used by the server to resolve names.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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

22. 2 features that make switches preferable to hubs
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Window Size
A. minimizing of collisions b. division into broadcast domains
A random delay helps prevent the stations from experiencing another collision during transmission.

23. Which type of cable is most often associated w/ fiber-optic cable?
A. show startup-config b. show running-config
TCP initializes the sequence numbers for the sessions.
Window Size
A backbone cable.

24. What command can be used to determine if the router has experienced any input or output errors?
A. physical layer b. DLL layer
It has expanded adressing capabilities.
Show Interfaces
Static

25. What info is found in the TCP and UDP header info?
Source and Destination Ports
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UDP
MAC

26. When a network service fails - which port is most often used to access a router for management purposes?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Router(config)# hostname Costas
Console
RJ-45

27. What is a benefit of a WAN?
OTDR
32 bits
Destination is not contacted before a packet is sent.
Host mobility

28. When a device is moved from one network to the other...?
Physical
Switch
Network
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

29. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
Collisions can decrease network performance.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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

30. What command is used to change the default name to 'Costas'?
The destination host address.
It provides interface between applications on either end of the network.
Physical
Router(config)# hostname Costas

31. What can get you to an outside network?
The address of the router that the host will use to 'get to the other side'.
A default gateway (router).
It provides interface between applications on either end of the network.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

32. Statements that describe LAN
Rollover 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)
Destination is not contacted before a packet is sent.
To prevent the receiver from being overwhelmed by incoming data.

33. What is a characteristic of a single-mode fiber-optic cable?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Create signals that represent the bits in each frame for the media.
It uses lasers as the light source.
255.255.255.0

34. To make a console connection from a comp to a Cisco router - what cable should be used?
A. perform degradation b. security issues c. host identification
Rollover cable
Switch
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

35. What are 2 forms of application layer software?
Host A
A. MTA b. SMTP
A. Physical b. Data Link
A. application b. services

36. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
8
A physical topology.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

37. Important characteristic of UDP
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Router(config)# hostname Costas
80 (HTTP)
Minimal delays in data delivery.

38. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Rollover cable
Source and Destination IP address
Supports error detection.
Switch

39. 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 reduces unnecessary broadcasts.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. show startup-config b. show running-config

40. When do changes take effect in a Cisco router?
It does not support encryption.
Rollover cable
Host A
As the commands are entered.

41. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
Static
DNS
The MAC protocol can be very simple.

42. What kind of problems are caused by excessive broadcast traffic on network segments?
A backbone cable.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Next-Hop Address

43. What characteristic of an UTP helps reduce interference?
A. goodput b. throughput c. bandwidth
Twisting of the cables
The magnetic field around the adjacent pairs of wire.
RJ-45

44. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
IP Protocol
Logical Link Control sublayer
A. addressing b. error detection c. frame delimiting

45. 3 properties of peer-2-peer applications
A. low overhead b. connectionless
A. replace a switch w/ a router b. subnet the new networks
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

46. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. hot keys b. context-sensitive c. command syntax check
A. decentralized resources b. resource sharing w/o a dedicated server
Network Layer Packet
A. replace a switch w/ a router b. subnet the new networks

47. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. copper UTP b. optical fiber
TCP initializes the sequence numbers for the sessions.
A. Physical b. Data Link
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

48. What event occurs during the 3-way handshake?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It uses support from the lower layers to distinguish between connections to the service.
TCP initializes the sequence numbers for the sessions.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

49. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
8
A. Physical b. Data Link
It provides interface between applications on either end of the network.

50. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Flash
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A physical topology.

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CCNA - 2

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