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. Encapsulation occurs at all - some or none of the layers of the OSI model?
TCP. It makes larger demands on a network
All
An alternate HTTP port
The default gateway address is the address of a router interface that is connected to the same network as the host.

2. 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
TCP
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Gateway

3. Why is IP 'media independent'?
TCP
It works the same on all Layer 1 media
32 - there are four octets of 8 bits each in an IPv4 address
1

4. 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

5. What is the port range for well known ports
32 - there are four octets of 8 bits each in an IPv4 address
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
Maximum transmission unit

6. Port 443 is?
Packet
POP3
HTTPS (Secure HTTP)
FTP

7. Port 110 is?
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
32 - there are four octets of 8 bits each in an IPv4 address
POP3
Gateway

8. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?
DNS - video-streaming - VoIP
Upper
RIP (Routing Information Protocol)
Routing table

9. Port 20 is?
TFTP - Trivial File Transfer Protocol
128
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
FTP

10. When an OSI Layer 4 PDU has been encapsulated at the network layer it is called a ______________.
Telnet
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Packet
POP3

11. List three network applications that use TCP
SMTP
Web browsing - email - file transfer
20 and 8
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

12. Are well known ports registered
Window size
Web browsing - email - file transfer
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
32 - there are four octets of 8 bits each in an IPv4 address

13. Which is a connectionless protocol - UDP or TCP?
DNS - video-streaming - VoIP
Unique
To track the different conversations crossing the network at the same time
UDP

14. In networking terms - What is reliability?
UDP - it sends datagrams as 'best effort'
It means ensuring that each segment that the source sends arrives at the destination
TFTP - Trivial File Transfer Protocol
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.

15. What four tasks does the network layer perform?
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
The source and destination port number
20 and 8
1

16. UDP does or does not create a session?
Data link - physical
49152 - 65535.
Does not
Routing table

17. Ephermeral port is what type of port
TCP
Dynamic / private
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
IRC

18. Which protocol ensures more reliable delivery between applications - TCP or UDP?
20 and 8
Ephermeral
Acknowledgment and reassembly (receipt of packets and putting them in right order)
TCP. It makes larger demands on a network

19. Port 8080 is?
User Datagram Protocol
20 and 8
An alternate HTTP port
Acknowledgment field significant

20. Which of the following are true about TCP and IP?

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

21. What is a broadcast domain?
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
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
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
RIP (Routing Information Protocol)

22. 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

23. What does segmentation provide to communications?
Purpose - ownership - and geographic location are key ways to divide a network
An alternate HTTP port
It is the most common - and it encapsulates transport layer segments
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

24. 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.
Gateway
DNS - video-streaming - VoIP
UDP

25. MTU stands for ?
Allows the transport layer function on the destination host to reassemble segments in the right order
Acknowledgment field significant
Maximum transmission unit
RIP (Routing Information Protocol)

26. What information does a router need to successfully forward packets?
1
Purpose - ownership - and geographic location are key ways to divide a network
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
Synchronize sequence numbers

27. End systems use port numbers to select the proper application. What is the lowest port number that can be dynamically assigned by the host system? 1 - 128 - 256 or 1024?
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
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
The source and destination port number
1

28. Which protocol provides just the basic functions for efficiently delivering data pieces between appropriate applications - TCP or UDP?

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

29. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?
Data link - physical
Routers (the subnetting process)
DNS - video-streaming - VoIP
TCP

30. 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?
Routers (the subnetting process)
TCP uses flow control
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Static routing

31. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
Ephermeral
Destination network - next-hop - metric
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Data link - physical

32. Which of the following are true about network layer encapsulation?
Destination network - next-hop - metric
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.
HTTPS (Secure HTTP)
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.

33. Which of the following are true about IP?
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
UDP
Netstat -r and route print
It is the most common - and it encapsulates transport layer segments

34. What is contained in the header of each segment or datagram?
Purpose - ownership - and geographic location are key ways to divide a network
To track the different conversations crossing the network at the same time
Telnet
The source and destination port number

35. IP is designed or not designed to track and manage the flow of packets?
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
Not - these are done by other protocols in other layers
Dynamic / private
Acknowledgment field significant

36. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?
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.
Gateway
Forward the packet to the default route interface (gateway) or just drop/discard the packets
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

37. What is the purpose of TCP/UDP port numbers?
An alternate HTTP port
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
To track the different conversations crossing the network at the same time
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.

38. ACK is?
False. It's like a file - only one process can read/write.
The default gateway address is the address of a router interface that is connected to the same network as the host.
32 - there are four octets of 8 bits each in an IPv4 address
Acknowledgment field significant

39. What is the port range for Registered ports
HTTPS (Secure HTTP)
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
Not - these are done by other protocols in other layers
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

40. When the client end of the session has no more data to transfer - it sets the ___________ flag in the header of the segment? (Hint: three-letter acronym)
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
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
FIN
DNS - video-streaming - VoIP

41. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
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
HTTPS (Secure HTTP)
Web browsing - email - file transfer
Connectionless

42. MSN messenger uses TCP or UDP?
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
Reliable - connection-oriented protocol (resends if not received)
Routing table
TCP

43. What are the transport layer's responsibilities?
All
Netstat -r and route print
Synchronize sequence numbers
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

44. The three-way handshake performs what three functions?
53
It works the same on all Layer 1 media
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
It Doesn't - TCP does

45. What is the protocol number for UDP?
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
Window size
The source and destination port number

46. What is the default DNS port number?
TCP. It makes larger demands on a network
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
53
DNS - video-streaming - VoIP

47. What is the proper order of SYN sequence?
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
Not - these are done by other protocols in other layers
Telnet
53

48. The three main features of routes in a routing table are?
Destination network - next-hop - metric
Routing table
Dynamic / private
Maximum transmission unit

49. During data transfer - What is the receiving host responsible for?
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
Acknowledgment and reassembly (receipt of packets and putting them in right order)
Web browsing - email - file transfer
Source and destination (ports) - Sequencing - Acknowledgement - Flow control

50. What is the port range for dynamic or private ports
To track the different conversations crossing the network at the same time
53
49152 - 65535.
RIP (Routing Information Protocol)