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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. When a device is moved from one network to the other...?
A. router b. firewall
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. hot keys b. context-sensitive c. command syntax check
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

2. In business LANs - which connector is used w/ twisted-pair networking cable?
Transport
Switch
RJ-45
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

3. What do you need to use for an initial configuration on a Cisco router?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Console interface
It reduces unnecessary broadcasts.
A. copper UTP b. optical fiber

4. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. show startup-config b. show running-config
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. enable mode b. priviledge executive mode
To enable a receiving host to forward the data to the appropriate application.

5. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
To facilitate the entry and exit of data on media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Transport
It uses lasers as the light source.

6. How does the application layer on a server process multiple client requests for services?
The packets will be delivered and reassembled at destination.
It uses support from the lower layers to distinguish between connections to the service.
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. larger address space b. data types and classes of service c. authentication and encryption

7. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
SSH
Minimal delays in data delivery.

8. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. decentralized resources b. resource sharing w/o a dedicated server
Hosts return to listen-before-transmit mode.
A. copper UTP b. optical fiber
It reduces unnecessary broadcasts.

9. Which layer supplies services and allows user interface?
Host A
When connecting a host to a switch.
Resolve IPv4 addresses to MAC addresses.
Application Layer

10. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Host mobility
A. DB 60 b. Winchester 15-pin c. smart serial
Hub
Router

11. What is a characteristic of a single-mode fiber-optic cable?
It does not support encryption.
Next-Hop Address
A. perform degradation b. security issues c. host identification
It uses lasers as the light source.

12. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
DNS
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

13. What is the role of the OSI Application Layer?
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It provides interface between applications on either end of the network.
A. router b. firewall

14. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
UDP
0 to 1023
It uses lasers as the light source.

15. During encapsulation - what happens in the Data Link Layer?
Source and Destination IP address
Router
The physical address is added.
It reduces unnecessary broadcasts.

16. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Network portion
UDP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

17. statements of IP adressing
The address of the router that the host will use to 'get to the other side'.
Console interface
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
No collisions will occur on this link.

18. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The physical address is added.
Destination Network Address
It provides interface between applications on either end of the network.

19. Why is flow control used for TCP data transfer?
Router(config)# interface FastEthernet 0/1
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer
It uses lasers as the light source.

20. Which combination of keys can be used to interrupt a ping or traceroute process?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network Access
They must wait until the first hosts finish transfering the media.
Ctrl + Shift + 6

21. Which device is used to create or divide broadcast domains?
Router
2046
Is a layer of specific encapsulation.
Network Media Control

22. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Transport
8
OTDR

23. What command can be used to determine if the router has experienced any input or output errors?
255.255.255.224
A. flow control b. session establishment c. numbering and sequencing
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Show Interfaces

24. What is the primary purpose of ARP?
Console interface
A. servers b. routers c. network printers
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
Resolve IPv4 addresses to MAC addresses.

25. Intermediary devices used to implement security between networks
A. router b. firewall
Next-Hop Address
A. copper UTP b. optical fiber
The physical address is added.

26. If you have a small network w/ 3 computers...
Is used by the server to resolve names.
Logical Link Control sublayer
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
Transport

27. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
A physical topology.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Supports error detection.

28. What type of network cable is used between a terminal and a console port?
Host mobility
OTDR
Rollover cable
It uses support from the lower layers to distinguish between connections to the service.

29. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
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. 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. they initiate data exchanges b. they may upload data to servers

30. What are key considering factors when grouping hosts into common networks?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To enable a receiving host to forward the data to the appropriate application.
A. purpose b. geographic location c. ownership
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

31. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
Originate data flow.
A. it has centralized administration b. security is easier to enforce
Ctrl + Shift + 6

32. To make a console connection from a comp to a Cisco router - what cable should be used?
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
To enable a receiving host to forward the data to the appropriate application.
A. router b. firewall
Rollover cable

33. 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
Originate data flow.
A. next-hop b. metric/interface c. destination network address
The packets will be delivered and reassembled at destination.

34. What statements describe the logical token-passing topology?
A. larger address space b. data types and classes of service c. authentication and encryption
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. netstat -r b. route PRINT
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

35. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Logical Link Control sublayer
Physical
Network address
Network Layer Packet

36. When destination network is not in the routing table - What are 2 actions the router might take?
Physical
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
MAC
A. DB 60 b. Winchester 15-pin c. smart serial

37. What is an automated service that matches resource names w/ required IP addresses?
Signal loss can be experienced.
A. goodput b. throughput c. bandwidth
DNS
Any device whose backoff timer expires first.

38. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. physical layer b. DLL layer
Supports error detection.
Any device whose backoff timer expires first.
A. application b. services

39. 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
The MAC protocol can be very simple.
A. addressing b. error detection c. frame delimiting
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The magnetic field around the adjacent pairs of wire.

40. 3 facts about the network portion of an IPv4 address
A. larger address space b. data types and classes of service c. authentication and encryption
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Destination is not contacted before a packet is sent.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

41. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
The destination host address.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
172.16.192.160

42. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Console
Network address

43. What 2 type of cables would most commonly be used for new runs?
Network Layer
A. Cat5 UTP b. Cat6 UTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Binary ANDing

44. What application layer protocol is used to support file transfers between client and server?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
FTP
Application Layer
Minimal delays in data delivery.

45. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Application Layer
Network address
A. Cat5 UTP b. Cat6 UTP

46. What are 2 protocols for transfering web resources?
A physical topology.
Show Interfaces
A. application b. services
A. HTTP b. HTTPS

47. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Network address
It provides interface between applications on either end of the network.
A. DNS b. SMTP c. POP

48. Statements that describe LAN
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Router
Is used by the server to resolve names.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

49. 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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Switch
SSH
A. show startup-config b. show running-config

50. 2 features that make switches preferable to hubs
Destination Network Address
Rollover cable
A. minimizing of collisions b. division into broadcast domains
Network Layer Packet

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CCNA - 2

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