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Cisco Network Fundamentals - 2

Instructions:

Answer 50 questions in 15 minutes.
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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 is a connection-oriented protocol - TCP or UDP?
The default gateway address is the address of a router interface that is connected to the same network as the host.
TCP
20 and 8
Ephermeral

2. What two commands can be used to view a host's routing table?
It Doesn't - TCP does
UDP
Telnet
Netstat -r and route print

3. Routers add routes for the connected networks to their ________________ .
POP3
Window size
Routing table
RIP (Routing Information Protocol)

4. Which of the following are not functions of the network layer?
Reliable - connection-oriented protocol (resends if not received)
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
TCP uses flow control
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

5. Port 443 is?
HTTPS (Secure HTTP)
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
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
It means ensuring that each segment that the source sends arrives at the destination

6. IP is designed or not designed to track and manage the flow of packets?
Does not
Not - these are done by other protocols in other layers
Upper
Dynamic / private

7. TCP header provides for
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Maximum transmission unit
Packet

8. What is the proper order of FIN sequence?
128
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
SMTP
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

9. Why is IP 'media independent'?
Allows the transport layer function on the destination host to reassemble segments in the right order
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
It works the same on all Layer 1 media
49152 - 65535.

10. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?
FTP
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
Forward the packet to the default route interface (gateway) or just drop/discard the packets
IRC

11. What is the default DNS port number?
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
53
TCP
RIP (Routing Information Protocol)

12. Which of the following are true about network layer encapsulation?
User Datagram Protocol
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
Dynamic / private
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.

13. How many bits are in an IPv4 address?
32 - there are four octets of 8 bits each in an IPv4 address
RIP (Routing Information Protocol)
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
Destination network - next-hop - metric

14. 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?
20 and 8
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
FIN

15. ACK is?
Gateway
Allows the transport layer function on the destination host to reassemble segments in the right order
Purpose - ownership - and geographic location are key ways to divide a network
Acknowledgment field significant

16. What is the name of the process of removing the OSI Layer 2 information from an IP packet?
HTTPS (Secure HTTP)
Forward the packet to the default route interface (gateway) or just drop/discard the packets
Decapsulation
TCP. It makes larger demands on a network

17. The router a network uses to send and receive messages beyond the network is called a ___________ router.
TCP
Gateway
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
Forward the packet to the default route interface (gateway) or just drop/discard the packets

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.
Data link - physical
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
TFTP - Trivial File Transfer Protocol

19. Dynamic ports fall into what category of port
Routers (the subnetting process)
Ephermeral
Synchronize sequence numbers
Maximum transmission unit

20. Which characteristics are part of TCP? Pick two: Reliable - connectionless - no flow control - resends anything not received?
Data link - physical
Reliable - connection-oriented protocol (resends if not received)
Upper
POP3

21. 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.
128
Window size
Netstat -r and route print

22. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?
IP. TCP is connection-oriented - and UDP is connectionless but works on the transport layer.
The source and destination port number
Dynamic routing adds packet-processing overhead - and routers can use static and dynamic routing simultaneously
Packet

23. Ephermeral port is what type of port
Acknowledgment field significant
Transport
Dynamic / private
20 and 8

24. The three-way handshake performs what three functions?
Allows the transport layer function on the destination host to reassemble segments in the right order
Packet
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
POP3

25. What is the purpose of TCP/UDP port numbers?
32 - there are four octets of 8 bits each in an IPv4 address
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
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
To track the different conversations crossing the network at the same time

26. On a particular network how would you determine the default gateway address for a host?
It Doesn't - TCP does
SMTP
The default gateway address is the address of a router interface that is connected to the same network as the host.
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts

27. What kinds of problems are caused by excessive broadcast traffic on a network segment?
False. It's like a file - only one process can read/write.
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts
Destination network - next-hop - metric
TCP. It makes larger demands on a network

28. 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?
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation
UDP
False. It's like a file - only one process can read/write.
Window size

29. What is the protocol number for UDP?
Decapsulation
Ephermeral
1
17 (A flag is set in the segment header. If this flag actually reads 17 - it is identified as a UDP header)

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

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31. What is the port range for well known ports
Static routing
RIP (Routing Information Protocol)
The source and destination port number
0 - 1023 (total of 1024). The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses

32. MTU stands for ?
Maximum transmission unit
Allows the transport layer function on the destination host to reassemble segments in the right order
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
It Doesn't - TCP does

33. Port 69 is?
TFTP - Trivial File Transfer Protocol
Static routing
To track the different conversations crossing the network at the same time
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation

34. What is the port range for dynamic or private ports
RIP (Routing Information Protocol)
49152 - 65535.
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
1024. The lower numbers are the well-known ports.1024 through 49151 are registered ports and used by the host for dynamic port allocation

35. Port 110 is?
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
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
Next hop - metric and destination network. Routers do not need source address - last hop - or default gateway to find a path to the network.
POP3

36. 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?
POP3
SMTP
Static routing
Reduced network bandwidth - increased overhead - and reduced host functions. The other answers are part of solutions to excessive broadcasts

37. Encapsulation occurs at all - some or none of the layers of the OSI model?
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
All
Addressing packets with IP addresses - Encapsulation - Routing - Decapsulation
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

38. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?
Connectionless - Best effort (unreliable) - media independent
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.
Connectionless

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

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40. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?
TFTP - Trivial File Transfer Protocol
To track the different conversations crossing the network at the same time
TCP uses flow control
Upper

41. What is a broadcast domain?
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
SMTP
IRC
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

42. 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)
It means ensuring that each segment that the source sends arrives at the destination
FIN -> FIN.ACK (terminate client to server) - FIN->FIN.ACK->Ack recvd (terminate server to client)
Static routing
FIN

43. In networking terms - What is reliability?
Routers (the subnetting process)
To track the different conversations crossing the network at the same time
Data link - physical
It means ensuring that each segment that the source sends arrives at the destination

44. What is the proper order of SYN sequence?
Transport
Segmentation provides the means to send and receive data when running multiple applications concurrently on a computer
SYN -> SYN.ACK->SEQ - ACK = SEQ+1 - SEQ is a random #
Web browsing - email - file transfer

45. Port 8080 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
Window size
An alternate HTTP port
Allows the transport layer function on the destination host to reassemble segments in the right order

46. The three main features of routes in a routing table are?
Destination network - next-hop - metric
An alternate HTTP port
20 and 8
Netstat -r and route print

47. Are well known ports registered
The source and destination port number
TCP
Source and destination (ports) - Sequencing - Acknowledgement - Flow control
Yes - for applications and services such as http - pop - smtp. Client requests services from a specific port.

48. MSN messenger uses TCP or UDP?
TCP
DNS - video-streaming - VoIP
Routing table
32 - there are four octets of 8 bits each in an IPv4 address

49. Which of the following is true about IP?

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50. Which is a connectionless protocol - UDP or TCP?
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
User Datagram Protocol
UDP
The default gateway address is the address of a router interface that is connected to the same network as the host.