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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. Port 25 is?
SMTP
It works the same on all Layer 1 media
IRC
49152 - 65535.

2. What does segmentation provide to communications?
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
Unique
FIN

3. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment
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
Window size
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
49152 - 65535.

4. 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?
TFTP - Trivial File Transfer Protocol
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.
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
Static routing

5. IP requires that each sending and receiving device have a __________ IP address.
An alternate HTTP port
Purpose - ownership - and geographic location are key ways to divide a network
Unique
UDP

6. List three network applications that use TCP
Synchronize sequence numbers
TCP. It makes larger demands on a network
Web browsing - email - file transfer
Destination network - next-hop - metric

7. What is the port range for dynamic or private ports
Netstat -r and route print
UDP - it sends datagrams as 'best effort'
49152 - 65535.
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #

8. Port 20 is?
Allows the transport layer function on the destination host to reassemble segments in the 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.
FTP
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.

9. On a particular network how would you determine the default gateway address for a host?
Routers (the subnetting process)
Forward the packet to the default route interface (gateway) or just drop/discard the packets
The default gateway address is the address of a router interface that is connected to the same network as the host.
UDP

10. The router a network uses to send and receive messages beyond the network is called a ___________ router.
All
Gateway
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.
FTP

11. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?
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
Window size
Routers (the subnetting process)
49152 - 65535.

12. Which is a connection-oriented protocol - TCP or UDP?
Data link - physical
Packet
TCP
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

13. Which of the following are true about static and dynamic routing?
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
DNS - video-streaming - VoIP
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
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

14. Are well known ports registered
Purpose - ownership - and geographic location are key ways to divide a network
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
53

15. Port 8080 is?
An alternate HTTP port
Window size
IRC
Acknowledgment and reassembly (receipt of packets and putting them in right order)

16. What are three key factors to consider when grouping hosts into a common network?
Decapsulation
Purpose - ownership - and geographic location are key ways to divide a 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
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.

17. Port 69 is?
The default gateway address is the address of a router interface that is connected to the same network as the host.
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
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
TFTP - Trivial File Transfer Protocol

18. 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.
POP3
Dynamic / private
Connectionless
Data link - physical

19. Which of the following is true about IP?

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

21. UDP does or does not create a session?
Unique
Does not
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
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.

22. During data transfer - What is the receiving host responsible for?
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
Acknowledgment and reassembly (receipt of packets and putting them in right order)
128
49152 - 65535.

23. TCP is a ________________ layer protocol.
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses
1
Transport
Reliable - connection-oriented protocol (resends if not received)

24. Port 520 is?
RIP (Routing Information Protocol)
Telnet
Transport
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.

25. Which is a connectionless protocol - UDP or TCP?
Reliable - connection-oriented protocol (resends if not received)
UDP
Connectionless
Packet

26. What are the transport layer's responsibilities?
Does not
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
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
Reliable - connection-oriented protocol (resends if not received)

27. What is a broadcast domain?
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
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
Upper
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)

28. What is the netstat utility used for on a host?
32 - there are four octets of 8 bits each in an IPv4 address
Reliable - connection-oriented protocol (resends if not received)
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
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

29. How many bits are in an IPv4 address?
To track the different conversations crossing the network at the same time
Dynamic / private
32 - there are four octets of 8 bits each in an IPv4 address
Connectionless

30. MTU stands for ?
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
TCP uses flow control
TCP
Maximum transmission unit

31. Port 110 is?
The source and destination port number
Gateway
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
POP3

32. Dynamic ports fall into what category of port
Window size
Ephermeral
IRC
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)

33. What kinds of problems are caused by excessive broadcast traffic on a network segment?
TCP
Packet
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
UDP

34. Ephermeral port is what type of port
Not - these are done by other protocols in other layers
POP3
An alternate HTTP port
Dynamic / private

35. What is contained in the header of each segment or datagram?
Not - these are done by other protocols in other layers
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
The source and destination port number
DNS - video-streaming - VoIP

36. 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.
Unique
TCP
Forward the packet to the default route interface (gateway) or just drop/discard the packets

37. Which protocol ensures more reliable delivery between applications - TCP or UDP?
TCP. It makes larger demands on a network
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.
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts

38. What information does a router need to successfully forward packets?
Connectionless - Best effort (unreliable) - media independent
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
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

39. How does UDP keep track of sequence numbers?

40. SYN is?
Data link - physical
Synchronize sequence numbers
The default gateway address is the address of a router interface that is connected to the same network as the host.
All

41. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
Dynamic / private
Connectionless
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

42. What is the purpose of TCP/UDP port numbers?
To track the different conversations crossing the network at the same time
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.
Packet
Routers (the subnetting process)

43. 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.
Synchronize sequence numbers
It Doesn't - TCP does
False. It's like a file - only one process can read/write.

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

45. How many bytes of overhead do TCP segments carry? How many does UDP carry?
Reliable - connection-oriented protocol (resends if not received)
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
FIN
20 and 8

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

47. The value of the ACK number field is equal to the client ISN plus ___________ (number)?
1
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Connectionless

48. IP is designed or not designed to track and manage the flow of packets?
Telnet
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
Not - these are done by other protocols in other layers
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts

49. What is the name of the process of removing the OSI Layer 2 information from an IP packet?
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
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
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
Decapsulation

50. Why does TCP use a sequence number in the header?
Window size
DNS - video-streaming - VoIP
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
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts