Test your basic knowledge |

Cisco Network Fundamentals - 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. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
2nd and third choices are correct--TCP is reliable and connection-oriented. IP is the one that's unreliable and connectionless. IP operates at the network layer.
Connectionless
TFTP - Trivial File Transfer Protocol
1

2. Port 110 is?
POP3
UDP - it sends datagrams as 'best effort'
Allows the transport layer function on the destination host to reassemble segments in the right order
TCP

3. Which of the following are not functions of the network layer?
Delivery reliability and application data analysis. The first is a transport layer concern - and the second is the presentation layer. Routing - addressing packets with an IP adress - encapsulation and decapsulation are functions of the network layer
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
All
It Doesn't - TCP does

4. Name the private address blocks
Purpose - ownership - and geographic location are key ways to divide a network
To reassemble the segments into data - To identify the application layer protocol - To indicate the number of the next expected byte - To show the maximum number of bytes allowed during a session. Allows the receiving host to reassemble segments in p
10.0.0.0/8 10.0.0.0 to 10.255.255.255 - 172.16.0.0/12 172.16.0.0 to 172.31.255.255 - 192.168.0.0/16 192.168.0.0 to 192.168.255.255
Gateway

5. How does UDP keep track of sequence numbers?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

6. Routers add routes for the connected networks to their ________________ .
Ephermeral
Keeping track of the individual conversations taking place between applications on the source and destinations hosts - Segmenting data and adding a header - Using header info to reassemble the segments into application data - Passing the assembled da
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Routing table

7. IP requires that each sending and receiving device have a __________ IP address.
It means ensuring that each segment that the source sends arrives at the destination
Unique
Does not
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

8. List three network applications that use UDP
Routers (the subnetting process)
Unique
53
DNS - video-streaming - VoIP

9. What is contained in the header of each segment or datagram?
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
The source and destination port number
Keeping track of the individual conversations taking place between applications on the source and destinations hosts - Segmenting data and adding a header - Using header info to reassemble the segments into application data - Passing the assembled da

10. Dynamic ports fall into what category of port
Routing table
Routers (the subnetting process)
Ephermeral
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.

11. Port 8080 is?
IRC
SMTP
An alternate HTTP port
The router matches the destination address in the packet header with the destination network of a route in the routing table and forwards the packet to the next-hop router specified by that route

12. Which protocol ensures more reliable delivery between applications - TCP or UDP?
TCP. It makes larger demands on a network
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
RIP (Routing Information Protocol)
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses

13. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
Maximum transmission unit
Window size
20 and 8

14. What is the name of the process of removing the OSI Layer 2 information from an IP packet?
32 - there are four octets of 8 bits each in an IPv4 address
Not - these are done by other protocols in other layers
It works the same on all Layer 1 media
Decapsulation

15. Port 194 is?
Maximum transmission unit
IRC
Netstat -r and route print
Connectionless

16. Ports can be shared at the same time? (t/f)

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

17. What are three key factors to consider when grouping hosts into a common network?
FTP
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
128
Purpose - ownership - and geographic location are key ways to divide a network

18. What does segmentation provide to communications?
The type-of-service field contains an 8-bit binary value that is used to determine the priority of each packet. This enables QoS (Quality of service) to happen.
Dynamic / private
Synchronize sequence numbers
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

19. What is the purpose of sequence numbers?
To reassemble the segments into data - To identify the application layer protocol - To indicate the number of the next expected byte - To show the maximum number of bytes allowed during a session. Allows the receiving host to reassemble segments in p
Allows the transport layer function on the destination host to reassemble segments in the right order
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation

20. MTU stands for ?
Maximum transmission unit
Netstat lists the protocols in use - the local address and port number - the foreign address and port number - and the state of the connection. Also displays active TCP connections - ports on which the computer is listening - Ethernet statistics - th
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts

21. Routes to remote networks with the associated next-hops can be manually configured on the router. What is the same for this type of routing?
DNS - video-streaming - VoIP
All
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
Static routing

22. What is the port range for dynamic or private ports
RIP (Routing Information Protocol)
49152 - 65535.
Gateway
It is used by both routers and hosts. The second one is incorrect because IP uses addressing information in the header to determine the best path for the packet. 'Reliable' is incorrect because IP is only a 'best effort' protocol

23. In networking terms - What is reliability?
It is the most common - and it encapsulates transport layer segments
1
It means ensuring that each segment that the source sends arrives at the destination
The router matches the destination address in the packet header with the destination network of a route in the routing table and forwards the packet to the next-hop router specified by that route

24. Which is a connection-oriented protocol - TCP or UDP?
TCP
Decapsulation
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
2nd and third choices are correct--TCP is reliable and connection-oriented. IP is the one that's unreliable and connectionless. IP operates at the network layer.

25. At the transport layer - which of the following controls is used to keep a transmitting host from overflowing the buffers of a receiving host? Choose one: Best effort - encryption - flow control - congestion avoidance?
An alternate HTTP port
TCP uses flow control
Not - these are done by other protocols in other layers
FIN

26. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?
TCP uses flow control
FTP
Routers (the subnetting process)
The type-of-service field contains an 8-bit binary value that is used to determine the priority of each packet. This enables QoS (Quality of service) to happen.

27. How many bits are in an IPv4 address?
Netstat lists the protocols in use - the local address and port number - the foreign address and port number - and the state of the connection. Also displays active TCP connections - ports on which the computer is listening - Ethernet statistics - th
TFTP - Trivial File Transfer Protocol
Reliable - connection-oriented protocol (resends if not received)
32 - there are four octets of 8 bits each in an IPv4 address

28. Pieces of information about a route that a routing table contains
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
1
TCP uses flow control
Transport

29. Port 520 is?
RIP (Routing Information Protocol)
Ephermeral
Reliable - connection-oriented protocol (resends if not received)
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

30. What two commands can be used to view a host's routing table?
Netstat -r and route print
TCP uses flow control
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
TCP

31. Which of the following are true about IP?
Forward the packet to the default route interface (gateway) or just drop/discard the packets
It is the most common - and it encapsulates transport layer segments
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
To track the different conversations crossing the network at the same time

32. What are the three basic characteristics of IPv4?
Destination network - next-hop - metric
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Reliable - connection-oriented protocol (resends if not received)
Connectionless - Best effort (unreliable) - media independent

33. The three main features of routes in a routing table are?
20 and 8
Destination network - next-hop - metric
UDP
Netstat -r and route print

34. Which of the following are true about static and dynamic routing?
Forward the packet to the default route interface (gateway) or just drop/discard the packets
UDP - it sends datagrams as 'best effort'
TCP uses flow control
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously

35. Which of the following is true about IP?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

36. On a particular network how would you determine the default gateway address for a host?
The default gateway address is the address of a router interface that is connected to the same network as the host.
It works the same on all Layer 1 media
Destination network - next-hop - metric
Does not

37. What is the proper order of FIN sequence?
The router matches the destination address in the packet header with the destination network of a route in the routing table and forwards the packet to the next-hop router specified by that route
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
53
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)

38. What four tasks does the network layer perform?
Maximum transmission unit
It is the most common - and it encapsulates transport layer segments
1024 - 49151. Unlike ports with lower numbers - developers of new TCP/UDP services can select a specific number to register with IANA rather than having a number assigned to them. Using registered ports also avoids the additional security restriction
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation

39. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Purpose - ownership - and geographic location are key ways to divide a network
1024 - 49151. Unlike ports with lower numbers - developers of new TCP/UDP services can select a specific number to register with IANA rather than having a number assigned to them. Using registered ports also avoids the additional security restriction
Upper

40. What are the transport layer's responsibilities?
POP3
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Keeping track of the individual conversations taking place between applications on the source and destinations hosts - Segmenting data and adding a header - Using header info to reassemble the segments into application data - Passing the assembled da
It Doesn't - TCP does

41. TCP header provides for
Acknowledgment field significant
An alternate HTTP port
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
TCP uses flow control

42. For a network layer packet to travel between hosts - it must be handed down to the _________________ layer - for another layer of encapsulation called framing - and then encoded and put onto the ____________ layer to be sent to the next router.
128
Data link - physical
POP3
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)

43. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
The router matches the destination address in the packet header with the destination network of a route in the routing table and forwards the packet to the next-hop router specified by that route
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
IRC

44. The three-way handshake performs what three functions?
Destination device is there - Figures out if it has an active service running and is accepting requests on the right port - Tells the destination device that it wants to communicate on said port
Acknowledgment and reassembly (receipt of packets and putting them in right order)
2nd and third choices are correct--TCP is reliable and connection-oriented. IP is the one that's unreliable and connectionless. IP operates at the network layer.
Synchronize sequence numbers

45. SYN is?
UDP
128
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Synchronize sequence numbers

46. What is the proper order of SYN sequence?
Delivery reliability and application data analysis. The first is a transport layer concern - and the second is the presentation layer. Routing - addressing packets with an IP adress - encapsulation and decapsulation are functions of the network layer
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
The router matches the destination address in the packet header with the destination network of a route in the routing table and forwards the packet to the next-hop router specified by that route
49152 - 65535.

47. Port 25 is?
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
Dynamic / private
TCP. It makes larger demands on a network
SMTP

48. Port 69 is?
TFTP - Trivial File Transfer Protocol
Allows the transport layer function on the destination host to reassemble segments in the right order
Upper
2nd and third choices are correct--TCP is reliable and connection-oriented. IP is the one that's unreliable and connectionless. IP operates at the network layer.

49. Why is IP 'media independent'?
UDP
The type-of-service field contains an 8-bit binary value that is used to determine the priority of each packet. This enables QoS (Quality of service) to happen.
TCP. It makes larger demands on a network
It works the same on all Layer 1 media

50. TCP is a ________________ layer protocol.
Transport
A broadcast domain is a logical part of a network (a network segment) in which any network equipment can transmit data directly to another equipment or device without going through a routing device (assuming the devices share the same subnet and use
An alternate HTTP port
It adds a header - and adds both source and destination IP addresses. Network layer encapsulation happens only on the original host; other devices can read the data - but they do not remove or alter it until the destination network is reached.