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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. How many bits are in an IPv6 address?
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
FTP
128
IRC

2. Which of the following are not functions of the network layer?
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
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
Web browsing - email - file transfer
DNS - video-streaming - VoIP

3. Dynamic ports fall into what category of port
Netstat -r and route print
FIN
Reliable - connection-oriented protocol (resends if not received)
Ephermeral

4. Routers add routes for the connected networks to their ________________ .
Routing table
32 - there are four octets of 8 bits each in an IPv4 address
TCP
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.

5. Port 20 is?
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
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
User Datagram Protocol
FTP

6. Encapsulation occurs at all - some or none of the layers of the OSI model?
Packet
All
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
User Datagram Protocol

7. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
An alternate HTTP port
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
53

8. What is a broadcast domain?
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
Unique
Acknowledgment and reassembly (receipt of packets and putting them in right order)
Window size

9. What is the purpose of sequence 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
Allows the transport layer function on the destination host to reassemble segments in the right order
Unique

10. How many bits are in an IPv4 address?
32 - there are four octets of 8 bits each in an IPv4 address
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
TCP uses flow control
Static routing

11. During data transfer - What is the receiving host responsible for?
Routers (the subnetting process)
IRC
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.

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

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13. IP is designed or not designed to track and manage the flow of packets?
Not - these are done by other protocols in other layers
32 - there are four octets of 8 bits each in an IPv4 address
Routing table
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

14. Which of the following are true about network layer encapsulation?
Gateway
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 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.
UDP

15. What are three key factors to consider when grouping hosts into a common network?
False. It's like a file - only one process can read/write.
Purpose - ownership - and geographic location are key ways to divide a network
20 and 8
Unique

16. Name the private address blocks
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
Purpose - ownership - and geographic location are key ways to divide a network
Upper
Acknowledgment and reassembly (receipt of packets and putting them in right order)

17. Are well known ports registered
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
All
User Datagram Protocol
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

18. 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)
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
FIN
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
Transport

19. UDP stands for?
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.
User Datagram Protocol
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
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.

20. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
HTTPS (Secure HTTP)
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Does not
Connectionless

21. What is the port range for well known ports
False. It's like a file - only one process can read/write.
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.
Upper
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses

22. On a particular network how would you determine the default gateway address for a host?
FIN
The default gateway address is the address of a router interface that is connected to the same network as the host.
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Acknowledgment and reassembly (receipt of packets and putting them in right order)

23. What information does a router need to successfully forward packets?
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.
Destination network - next-hop - metric
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
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

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

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25. Port 25 is?
Unique
SMTP
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Gateway

26. What four tasks does the network layer perform?
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
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
It Doesn't - TCP does
Gateway

27. What is the proper order of SYN sequence?
Acknowledgment field significant
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
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #

28. What is the port range for Registered ports
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
Gateway
Acknowledgment field significant
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.

29. How does UDP keep track of sequence numbers?

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30. Ephermeral port is what type of port
To track the different conversations crossing the network at the same time
TCP uses flow control
Dynamic / private
User Datagram Protocol

31. Which characteristics are part of TCP? Pick two: Reliable - connectionless - no flow control - resends anything not received?
Packet
Reliable - connection-oriented protocol (resends if not received)
Routing table
Static routing

32. TCP header provides for
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
Not - these are done by other protocols in other layers
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Netstat -r and route print

33. Pieces of information about a route that a routing table contains
UDP - it sends datagrams as 'best effort'
Static routing
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
Synchronize sequence numbers

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

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35. When an OSI Layer 4 PDU has been encapsulated at the network layer it is called a ______________.
Destination network - next-hop - metric
Packet
Acknowledgment field significant
FIN

36. Why is IP 'media independent'?
DNS - video-streaming - VoIP
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
TCP uses flow control
It works the same on all Layer 1 media

37. SYN is?
Synchronize sequence numbers
Window size
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
Upper

38. ACK is?
Purpose - ownership - and geographic location are key ways to divide a network
Acknowledgment field significant
RIP (Routing Information Protocol)
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

39. IP requires that each sending and receiving device have a __________ IP address.
UDP
TCP uses flow control
Window size
Unique

40. What are the three basic characteristics of IPv4?
IRC
Connectionless - Best effort (unreliable) - media independent
User Datagram Protocol
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

41. What does segmentation provide to communications?
TCP. It makes larger demands on a network
Forward the packet to the default route interface (gateway) or just drop/discard the packets
1
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

42. The router a network uses to send and receive messages beyond the network is called a ___________ router.
Gateway
SMTP
Not - these are done by other protocols in other layers
53

43. Port 69 is?
49152 - 65535.
DNS - video-streaming - VoIP
The source and destination port number
TFTP - Trivial File Transfer Protocol

44. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?
49152 - 65535.
Upper
UDP
It is the most common - and it encapsulates transport layer segments

45. Port 23 is?
It is the most common - and it encapsulates transport layer segments
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Routers (the subnetting process)
Telnet

46. What is the purpose of TCP/UDP port numbers?
It means ensuring that each segment that the source sends arrives at the destination
UDP
To track the different conversations crossing the network at the same time
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

47. 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?
Static routing
FTP
Destination network - next-hop - metric
DNS - video-streaming - VoIP

48. Port 8080 is?
Window size
Web browsing - email - file transfer
An alternate HTTP port
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses

49. Which of the following are true about IP?
It is the most common - and it encapsulates transport layer segments
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
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
Acknowledgment and reassembly (receipt of packets and putting them in right order)

50. What is the proper order of FIN sequence?
Reliable - connection-oriented protocol (resends if not received)
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
The default gateway address is the address of a router interface that is connected to the same network as the host.
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