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. What is contained in the header of each segment or datagram?
Routing table
User Datagram Protocol
Unique
The source and destination port number

2. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
Window size
Web browsing - email - file transfer
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.

3. Are well known ports registered
IRC
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.
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Static routing

4. Which protocol ensures more reliable delivery between applications - TCP or UDP?
TCP. It makes larger demands on a network
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.
Not - these are done by other protocols in other layers
128

5. Port 20 is?
Forward the packet to the default route interface (gateway) or just drop/discard the packets
FTP
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Destination network - next-hop - metric

6. List three network applications that use UDP
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
DNS - video-streaming - VoIP
RIP (Routing Information Protocol)

7. 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?
TCP uses flow control
To track the different conversations crossing the network at the same time
TCP
53

8. On a particular network how would you determine the default gateway address for a host?
User Datagram Protocol
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
The default gateway address is the address of a router interface that is connected to the same network as the host.
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

9. What are the transport layer's responsibilities?
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Connectionless
To track the different conversations crossing the network at the same time
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. SYN is?
It is the most common - and it encapsulates transport layer segments
Synchronize sequence numbers
53
Upper

11. List three network applications that use TCP
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Dynamic / private
Web browsing - email - file transfer
53

12. What is the port range for dynamic or private ports
FTP
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.
49152 - 65535.
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)

13. What four tasks does the network layer perform?
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
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
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
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

14. What does segmentation provide to communications?
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Routing table
Packet
Connectionless - Best effort (unreliable) - media independent

15. MTU stands for ?
Maximum transmission unit
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.
TFTP - Trivial File Transfer Protocol
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

16. TCP header provides for
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
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
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

17. The three main features of routes in a routing table are?
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
Synchronize sequence numbers
Destination network - next-hop - metric
128

18. 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
An alternate HTTP port
All
It Doesn't - TCP does

19. 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

20. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?
Forward the packet to the default route interface (gateway) or just drop/discard the packets
1
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously

21. Dynamic ports fall into what category of port
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.
Ephermeral
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
TCP uses flow control

22. 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.
Packet
FTP
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
Data link - physical

23. What is the default DNS port number?
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Transport
Not - these are done by other protocols in other layers
53

24. Which of the following are true about static and dynamic routing?
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
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
It Doesn't - TCP does
Transport

25. Port 443 is?
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
HTTPS (Secure HTTP)
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
UDP

26. What is a broadcast domain?
TCP. It makes larger demands on a network
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.
It works the same on all Layer 1 media
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

27. How many bytes of overhead do TCP segments carry? How many does UDP carry?
Packet
Destination network - next-hop - metric
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
20 and 8

28. What is the proper order of SYN sequence?
Telnet
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
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
IRC

29. 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
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
UDP - it sends datagrams as 'best effort'

30. Ephermeral port is what type of port
128
Dynamic / private
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
FIN

31. Port 194 is?
Transport
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
The source and destination port number
IRC

32. What is the name of the process of removing the OSI Layer 2 information from an IP packet?
Ephermeral
Decapsulation
Transport
32 - there are four octets of 8 bits each in an IPv4 address

33. 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.
FTP
Ephermeral
Maximum transmission unit

34. How many bits are in an IPv4 address?
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Gateway
32 - there are four octets of 8 bits each in an IPv4 address
Acknowledgment and reassembly (receipt of packets and putting them in right order)

35. Routers add routes for the connected networks to their ________________ .
Acknowledgment field significant
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
Routing table
The source and destination port number

36. When an OSI Layer 4 PDU has been encapsulated at the network layer it is called a ______________.
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
Packet
Destination network - next-hop - metric

37. What is the purpose of TCP/UDP port numbers?
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
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.
Unique

38. What is the port range for Registered ports
1
Packet
Ephermeral
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

39. What are three key factors to consider when grouping hosts into a common network?
Purpose - ownership - and geographic location are key ways to divide a network
32 - there are four octets of 8 bits each in an IPv4 address
Forward the packet to the default route interface (gateway) or just drop/discard the packets
20 and 8

40. MSN messenger uses TCP or UDP?
Synchronize sequence numbers
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
Connectionless
TCP

41. Port 520 is?
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
POP3
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
RIP (Routing Information Protocol)

42. What is the netstat utility used for on a host?
49152 - 65535.
FIN
UDP
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

43. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?
SMTP
Connectionless - Best effort (unreliable) - media independent
Routers (the subnetting process)
Telnet

44. In networking terms - What is reliability?
Ephermeral
It means ensuring that each segment that the source sends arrives at the destination
1
49152 - 65535.

45. Port 69 is?
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
TFTP - Trivial File Transfer Protocol
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Telnet

46. Why is IP 'media independent'?
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.
FIN
Packet
It works the same on all Layer 1 media

47. During data transfer - What is the receiving host responsible for?
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Maximum transmission unit
UDP - it sends datagrams as 'best effort'
Acknowledgment and reassembly (receipt of packets and putting them in right order)

48. 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?
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
Decapsulation
Allows the transport layer function on the destination host to reassemble segments in the right order
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

49. Which of the following are true about IP?
The default gateway address is the address of a router interface that is connected to the same network as the host.
The source and destination port number
It works the same on all Layer 1 media
It is the most common - and it encapsulates transport layer segments

50. 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