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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Is a layer of specific encapsulation.
Binary ANDing
TCP initializes the sequence numbers for the sessions.
A. copper UTP b. optical fiber

2. 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?
Logical Link Control sublayer
Host A
They must wait until the first hosts finish transfering the media.
A. it has centralized administration b. security is easier to enforce

3. What is the purpose of resource records in DNS?
No collisions will occur on this link.
Window Size
Rollover cable
Is used by the server to resolve names.

4. What is the purpose of the TCP/IP Network Application Layer?
IP is not properly installed
Network Media Control
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.

5. statements of IP adressing
A default gateway (router).
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
255.255.255.224
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

6. 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
Physical
It provides interface between applications on either end of the network.
A. replace a switch w/ a router b. subnet the new networks

7. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
The packets will be delivered and reassembled at destination.
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
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

8. Intermediary devices used to implement security between networks
Fiber
A random delay helps prevent the stations from experiencing another collision during transmission.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. router b. firewall

9. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
Ctrl + Shift + 6
A. non-deterministic b. less overhead c. collisions exist
UDP

10. 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
The address of the router that the host will use to 'get to the other side'.
Hosts return to listen-before-transmit mode.
The physical address is added.

11. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
A. HTTP b. HTTPS
Router
Network

12. What is PDU?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Is a layer of specific encapsulation.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Network address

13. What command can be used to determine if the router has experienced any input or output errors?
A. DNS b. SMTP c. POP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Show Interfaces
Source and Destination Ports

14. 3 protocols that operate in the application layer
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. DNS b. SMTP c. POP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

15. What is dinamically selected by the source host when forwarding data?
Source Port
A. show startup-config b. show running-config
Router
Hosts return to listen-before-transmit mode.

16. What characteristic of an UTP helps reduce interference?
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Twisting of the cables
Wireless

17. 2 characteristics of clients in data networks
Create signals that represent the bits in each frame for the media.
Resolve IPv4 addresses to MAC addresses.
A backbone cable.
A. they initiate data exchanges b. they may upload data to servers

18. When a device is moved from one network to the other...?
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
Network Media Control
A. flow control b. session establishment c. numbering and sequencing
It reduces unnecessary broadcasts.

19. What are 2 protocols for transfering web resources?
Fiber
A. DB 60 b. Winchester 15-pin c. smart serial
A. HTTP b. HTTPS
Show Interfaces

20. What is the primary purpose of ARP?
SMB
Destination is not contacted before a packet is sent.
Resolve IPv4 addresses to MAC addresses.
Supports error detection.

21. 3 characteristics of valid Ethernet Layer 2 addresses
Is a layer of specific encapsulation.
TCP initializes the sequence numbers for the sessions.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. media sharing b. logical topology

22. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
UTP
Rollover cable
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

23. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
Router(config)# hostname Costas
IP is not properly installed
0 to 1023

24. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. next-hop b. metric/interface c. destination network address
Router
Rollover cable

25. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
Network address
Hosts return to listen-before-transmit mode.
Rollover cable

26. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Hub
A. next-hop b. metric/interface c. destination network address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

27. What info is found in the TCP and UDP header info?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Source and Destination Ports
As the commands are entered.
A. it has centralized administration b. security is easier to enforce

28. What type of routing uses information that is manually entered into the routing table?
A. flow control b. session establishment c. numbering and sequencing
Collisions can decrease network performance.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Static

29. What is an effect of improperly applying a network cable connector?
It has expanded adressing capabilities.
A. HTTP b. HTTPS
Logical Link Control sublayer
Signal loss can be experienced.

30. Which portion of the network layer address does a router use to forward packets?
Time-to-live (TTL)
A. Physical b. Data Link
Network portion
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

31. Which layer supplies services and allows user interface?
Time-to-live (TTL)
Application Layer
Network Media Control
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

32. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. show startup-config b. show running-config
Originate data flow.
Identify the device that allows local network computers to communicate w/ devices in other networks.
IP is not properly installed

33. 3 measures of data transfer
It has expanded adressing capabilities.
A. goodput b. throughput c. bandwidth
A. performance degradation b. security issues c. host identification
Flash

34. What application layer protocol is used to support file transfers between client and server?
FTP
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
8
Network Layer

35. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. they initiate data exchanges b. they may upload data to servers
A. performance degradation b. security issues c. host identification
Network Layer

36. Statements that describe LAN
Static
Network Layer Packet
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
SSH

37. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
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
A. show startup-config b. show running-config
TCP initializes the sequence numbers for the sessions.

38. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
255.255.255.0
To facilitate the entry and exit of data on media.

39. 2 characteristics of peer-2-peer
No collisions will occur on this link.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. decentralized resources b. resource sharing w/o a dedicated server
Wireless

40. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Switch
A. Cat5 UTP b. Cat6 UTP
Logical Link Control sublayer

41. How does the application layer on a server process multiple client requests for services?
It reduces unnecessary broadcasts.
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
TCP initializes the sequence numbers for the sessions.

42. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Network address
Destination Network Address
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

43. How many bits make up an IPv4 address?
8
Rollover cable
A. it has centralized administration b. security is easier to enforce
32 bits

44. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. hot keys b. context-sensitive c. command syntax check
80 (HTTP)
DNS
SMB

45. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
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. addressing b. error detection c. frame delimiting
Network Layer Packet
Switch

46. What is a disadvantage of Telnet?
It provides interface between applications on either end of the network.
Host A
A. hot keys b. context-sensitive c. command syntax check
It does not support encryption.

47. What are 3 pieces of info about a route contained in a routing table?
Create signals that represent the bits in each frame for the media.
Wireless
A. next-hop b. metric/interface c. destination network address
SMB

48. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
IP is not properly installed
Network
Router(config)# hostname Costas

49. What do end devices do?
Originate data flow.
Time-to-live (TTL)
RJ-45
Router(config)# interface FastEthernet 0/1

50. What statements describe the logical token-passing topology?
Router
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The packets will be delivered and reassembled at destination.
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