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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. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?
Upper
IRC
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Acknowledgment field significant

2. How many bits are in an IPv6 address?
TFTP - Trivial File Transfer Protocol
HTTPS (Secure HTTP)
An alternate HTTP port
128

3. During data transfer - What is the receiving host responsible for?
IRC
Acknowledgment and reassembly (receipt of packets and putting them in right order)
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)

4. When an OSI Layer 4 PDU has been encapsulated at the network layer it is called a ______________.
53
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
Packet
TCP uses flow control

5. TCP is a ________________ layer protocol.
Window size
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
Static routing
Transport

6. Which of the following are not functions of the network layer?
DNS - video-streaming - VoIP
UDP
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
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

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

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8. MSN messenger uses TCP or UDP?
Web browsing - email - file transfer
TCP
TFTP - Trivial File Transfer Protocol
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)

9. Which of the following is true about IP?

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10. List three network applications that use UDP
Transport
DNS - video-streaming - VoIP
128
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

11. List three network applications that use TCP
Transport
Web browsing - email - file transfer
FIN
All

12. What are the transport layer's responsibilities?
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
SMTP
TFTP - Trivial File Transfer Protocol
Acknowledgment field significant

13. Which of the following are true about IP?
TCP
It is the most common - and it encapsulates transport layer segments
An alternate HTTP port
Destination network - next-hop - metric

14. In networking terms - What is reliability?
Reliable - connection-oriented protocol (resends if not received)
Telnet
It means ensuring that each segment that the source sends arrives at the destination
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.

15. Port 443 is?
False. It's like a file - only one process can read/write.
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
HTTPS (Secure HTTP)
Does not

16. How many bits are in an IPv4 address?
32 - there are four octets of 8 bits each in an IPv4 address
Acknowledgment field significant
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
Maximum transmission unit

17. 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.
TCP uses flow control
Packet
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses

18. The value of the ACK number field is equal to the client ISN plus ___________ (number)?
1
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
Upper
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer

19. The router a network uses to send and receive messages beyond the network is called a ___________ router.
32 - there are four octets of 8 bits each in an IPv4 address
User Datagram Protocol
Gateway
Connectionless - Best effort (unreliable) - media independent

20. What is contained in the header of each segment or datagram?
The source and destination port number
TCP uses flow control
Routing table
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

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?
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.
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
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

22. Which is a connectionless protocol - UDP or TCP?
UDP
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
SMTP
TCP

23. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
To track the different conversations crossing the network at the same time
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
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.

24. 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
Acknowledgment field significant
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Unique

25. On a particular network how would you determine the default gateway address for a host?
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
The default gateway address is the address of a router interface that is connected to the same network as the host.
TCP. It makes larger demands on a network
Gateway

26. What does segmentation provide to communications?
Window size
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
It Doesn't - TCP does

27. IP is designed or not designed to track and manage the flow of packets?
It is the most common - and it encapsulates transport layer segments
Not - these are done by other protocols in other layers
20 and 8
Purpose - ownership - and geographic location are key ways to divide a network

28. Which of the following are true about static and dynamic routing?
20 and 8
Gateway
Acknowledgment and reassembly (receipt of packets and putting them in right order)
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously

29. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment
False. It's like a file - only one process can read/write.
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Window size
Not - these are done by other protocols in other layers

30. Port 520 is?
49152 - 65535.
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
RIP (Routing Information Protocol)
UDP - it sends datagrams as 'best effort'

31. What is the proper order of FIN sequence?
Decapsulation
It is the most common - and it encapsulates transport layer segments
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
POP3

32. IP requires that each sending and receiving device have a __________ IP address.
32 - there are four octets of 8 bits each in an IPv4 address
The source and destination port number
Unique
Acknowledgment field significant

33. SYN is?
Synchronize sequence numbers
IRC
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the 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.

34. What is a broadcast domain?
Purpose - ownership - and geographic location are key ways to divide a network
Upper
Connectionless - Best effort (unreliable) - media independent
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

35. What is the purpose of the ToS field in the IPv4 header?
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.
Connectionless - Best effort (unreliable) - media independent
TCP uses flow control
It Doesn't - TCP does

36. ACK is?
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
Routing table
Acknowledgment field significant

37. What two commands can be used to view a host's routing table?
Connectionless - Best effort (unreliable) - media independent
Netstat -r and route print
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)

38. TCP header provides for
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Reliable - connection-oriented protocol (resends if not received)
Maximum transmission unit

39. What is the netstat utility used for on a host?
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.
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
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.

40. Which of the following are true about network layer encapsulation?
Purpose - ownership - and geographic location are key ways to divide a network
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
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.
Packet

41. 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
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Synchronize sequence numbers
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

42. MTU stands for ?
POP3
TCP. It makes larger demands on a network
SMTP
Maximum transmission unit

43. What is the purpose of TCP/UDP port numbers?
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
To track the different conversations crossing the network at the same time
Ephermeral
FIN

44. 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)
Acknowledgment and reassembly (receipt of packets and putting them in right order)
FIN
Ephermeral
Routers (the subnetting process)

45. What is the proper order of SYN sequence?
UDP - it sends datagrams as 'best effort'
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
An alternate HTTP port

46. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?
POP3
Dynamic / private
Forward the packet to the default route interface (gateway) or just drop/discard the packets
49152 - 65535.

47. Encapsulation occurs at all - some or none of the layers of the OSI model?
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
All
Destination network - next-hop - metric
TCP

48. Port 8080 is?
To track the different conversations crossing the network at the same time
TFTP - Trivial File Transfer Protocol
An alternate HTTP port
Packet

49. What is the port range for dynamic or private ports
POP3
Netstat -r and route print
49152 - 65535.
UDP

50. Which protocol ensures more reliable delivery between applications - 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
TCP. It makes larger demands on a network
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