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. Which of the following are true about network layer encapsulation?
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.
Synchronize sequence numbers
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.
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

2. What is contained in the header of each segment or datagram?
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
The source and destination port number
Purpose - ownership - and geographic location are key ways to divide a network
UDP - it sends datagrams as 'best effort'

3. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?
DNS - video-streaming - VoIP
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
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
Forward the packet to the default route interface (gateway) or just drop/discard the packets

4. Routers add routes for the connected networks to their ________________ .
UDP - it sends datagrams as 'best effort'
Routing table
Data link - physical
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

5. 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.
Forward the packet to the default route interface (gateway) or just drop/discard the packets
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
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

6. Port 23 is?
UDP
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Telnet
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.

7. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
Connectionless
Static routing
TFTP - Trivial File Transfer Protocol
It works the same on all Layer 1 media

8. What does segmentation provide to communications?
An alternate HTTP port
False. It's like a file - only one process can read/write.
POP3
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

9. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
TFTP - Trivial File Transfer Protocol
An alternate HTTP port
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
HTTPS (Secure HTTP)

10. 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?
It means ensuring that each segment that the source sends arrives at the destination
It Doesn't - TCP does
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
Purpose - ownership - and geographic location are key ways to divide a network

11. 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

12. TCP header provides for
1
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Unique

13. Which characteristics are part of TCP? Pick two: Reliable - connectionless - no flow control - resends anything not received?
Reliable - connection-oriented protocol (resends if not received)
TCP
Telnet
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

14. IP is designed or not designed to track and manage the flow of packets?
Destination network - next-hop - metric
Not - these are done by other protocols in other layers
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.
53

15. Which is a connection-oriented protocol - TCP or UDP?
It means ensuring that each segment that the source sends arrives at the destination
DNS - video-streaming - VoIP
TCP
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

16. What are the transport layer's responsibilities?
It Doesn't - TCP does
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Routers (the subnetting process)
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

17. 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

18. Name the private address blocks
User Datagram Protocol
32 - there are four octets of 8 bits each in an IPv4 address
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
Ephermeral

19. 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?
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
Static routing
Decapsulation
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

20. The three main features of routes in a routing table are?
Reliable - connection-oriented protocol (resends if not received)
20 and 8
Destination network - next-hop - metric
It Doesn't - TCP does

21. What four tasks does the network layer perform?
It works the same on all Layer 1 media
Reliable - connection-oriented protocol (resends if not received)
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Not - these are done by other protocols in other layers

22. MSN messenger uses TCP or UDP?
Transport
An alternate HTTP port
TCP
Not - these are done by other protocols in other layers

23. Encapsulation occurs at all - some or none of the layers of the OSI model?
All
Static routing
Acknowledgment field significant
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

24. Port 110 is?
128
POP3
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
Window size

25. TCP is a ________________ layer protocol.
Decapsulation
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
False. It's like a file - only one process can read/write.
Transport

26. 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

27. The router a network uses to send and receive messages beyond the network is called a ___________ router.
Routing table
Gateway
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

28. What is the purpose of sequence numbers?
Allows the transport layer function on the destination host to reassemble segments in the right order
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
Window size

29. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment
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
UDP
Window size
Maximum transmission unit

30. SYN is?
Synchronize sequence numbers
Not - these are done by other protocols in other layers
Upper
Connectionless - Best effort (unreliable) - media independent

31. IP requires that each sending and receiving device have a __________ IP address.
Unique
TCP
Not - these are done by other protocols in other layers
SMTP

32. Which is a connectionless protocol - UDP or TCP?
FIN
UDP
Destination network - next-hop - metric
Ephermeral

33. Which protocol ensures more reliable delivery between applications - TCP or UDP?
Routers (the subnetting process)
TCP. It makes larger demands on a network
POP3
UDP - it sends datagrams as 'best effort'

34. What are three key factors to consider when grouping hosts into a common 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
Purpose - ownership - and geographic location are key ways to divide a network
POP3
53

35. What are the three basic characteristics of IPv4?
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
Reliable - connection-oriented protocol (resends if not received)
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Connectionless - Best effort (unreliable) - media independent

36. What information does a router need to successfully forward packets?
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Connectionless - Best effort (unreliable) - media independent
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
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

37. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?
Transport
Routing table
Routers (the subnetting process)
Maximum transmission unit

38. How many bytes of overhead do TCP segments carry? How many does UDP carry?
Unique
Acknowledgment and reassembly (receipt of packets and putting them in right order)
20 and 8
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

39. Which of the following are true about IP?
It is the most common - and it encapsulates transport layer segments
Ephermeral
RIP (Routing Information Protocol)
Connectionless

40. What is the port range for well known ports
POP3
TCP uses flow control
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 / private

41. Dynamic ports fall into what category of port
Ephermeral
All
Unique
Purpose - ownership - and geographic location are key ways to divide a network

42. UDP does or does not create a session?
Does not
It is the most common - and it encapsulates transport layer segments
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
DNS - video-streaming - VoIP

43. Port 25 is?
20 and 8
SMTP
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

44. MTU stands for ?
Maximum transmission unit
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
To track the different conversations crossing the network at the same time
FTP

45. Port 69 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
32 - there are four octets of 8 bits each in an IPv4 address
TFTP - Trivial File Transfer Protocol
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.

46. What is the name of the process of removing the OSI Layer 2 information from an IP packet?
53
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
UDP
Decapsulation

47. Which of the following are not functions of the network layer?
Destination network - next-hop - metric
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
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
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

48. List three network applications that use TCP
Web browsing - email - file transfer
1
UDP - it sends datagrams as 'best effort'
The source and destination port number

49. What is the protocol number for UDP?
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)
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
Web browsing - email - file transfer
53

50. What is the proper order of FIN sequence?
Dynamic / private
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
Web browsing - email - file transfer
To track the different conversations crossing the network at the same time