ENetwork Chapter 4

1
Refer to the exhibit. Host A is using FTP to download a large file from Server 1. During the download process, Server 1 does not receive an acknowledgment from Host A for several bytes of transferred data. What action will Server 1 take as a result?

•     reach a timeout and resend the data that needs to be acknowledged

   
2   
Which information is found in both the TCP and UDP header information?

•    source and destination port

3   
After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server?

•     80

   
4   
With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?

•     0 to 1023

   
5   
Which three features allow TCP to reliably and accurately track the transmission of data from source to destination? (Choose three.)

•     flow control
•     session establishment
•     numbering and sequencing

6  

Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)

•     The local host is using three client sessions.
•     The local host is using web sessions to a remote server.

   
7   

Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)

•     This contains a Telnet request.
•     This is a TCP header.

8   
What are two features of the User Datagram Protocol (UDP)? (Choose two.)

•     low overhead
•     connectionless

   
9   
What is dynamically selected by the source host when forwarding data?

•     source port

10   
Why is flow control used for TCP data transfer?

•     to prevent the receiver from being overwhelmed by incoming data

   
11   
During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?

•     The packets will be delivered and reassembled at the destination.

   
12   

Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1 has sent a SYN message to begin session establishment. What happens next?

•     Host2 sends a segment with the ACK flag = 1, SYN flag = 1 to Host1.

13   
Which two options represent Layer 4 addressing? (Choose two.)

•     identifies the communicating applications
•     identifies multiple conversations between the hosts

   
14   
Which event occurs during the transport layer three-way handshake?

•     TCP initializes the sequence numbers for the sessions.

   
15   
Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?

•     transport

16   
Which is an important characteristic of UDP?

•     minimal delays in data delivery

17   
What mechanism is used by TCP to provide flow control as segments travel from source to destination?

•     window size

18   
Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?

•     UDP

19   
Why are port numbers included in the TCP header of a segment?

•     to enable a receiving host to forward the data to the appropriate application

20   

Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?

•     session establishment

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ENetwork Chapter 3

1   
What is the purpose of resource records in DNS?

•     used by the server to resolve names

   
2   
What are two forms of application layer software? (Choose two.)

•     applications
•     services

   
3  

Refer to the exhibit. What is the destination port for the communication that is represented on line 5?

•     80

   
4   
What are two characteristics of peer-to-peer networks? (Choose two.)

•     decentralized resources
•     resource sharing without a dedicated server

5   
What is the automated service that matches resource names with the required IP address?

•     DNS

   
6   
What three protocols operate at the Application layer of the OSI model? (Choose three.)

•     DNS
•     SMTP
•     POP

   
7   
What are three properties of peer-to-peer applications? (Choose three.)

•     acts as both a client and server within the same communication
•     hybrid mode includes a centralized directory of files
•     can be used in client-server networks

   
8   
Which application layer protocols correctly match a corresponding function? (Choose two.)

•     HTTP transfers data from a web server to a client
•     Telnet provides a virtual connection for remote access

9   
A small home network has been installed to interconnect three computers together for gaming and file sharing. What two properties represent this network type? (Choose two.)

•     Security is difficult to enforce.
•     A computer that responds to a file sharing request is functioning as a server.

10   
As compared to SSH, what is the primary disadvantage of telnet?

•     does not support encryption

   
11   
Which statements are correct concerning the role of the MTA in handling email? (Choose three.)

•     receives email from the client's MUA
•     passes email to the MDA for final delivery
•     uses SMTP to route email between servers

   
12   
Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)

•     HTTP
•     HTTPS

   
13   
What application layer protocol is commonly used to support for file transfers between a client and a server?

•     FTP

   
14   
Which layer of the OSI model supplies services that allow user to interface with the network?

•     application

   
15   
A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two.)

•     centralized administration
•     security is easier to enforce

   
16   
Which email components are used to forward mail between servers? (Choose two.)

•     MTA
•     SMTP

   
17   
What application layer protocol describes the services that are used for file sharing in Microsoft networks?

•     SMB

   
18   
What are two characteristics of clients in data networks? (Choose two.)

•     initiate data exchanges
•     may upload data to servers

   
19   
What is the role of the OSI application layer?

•     provides the interface between the applications on either end of the network

20   
How does the application layer on a server usually process multiple client request for services?

•     uses support from lower layer functions to distinguish between connections to the service

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ENetwork Chapter 2

1   

Which three statements best describe a Local Area Network (LAN)? (Choose three.)

•     A LAN is usually in a single geographical area.

•     The network is administered by a single organization.

•     A LAN provides network services and access to applications for users within a common organization.

   

2   

What are two functions of encapsulation? (Choose two.)

•     identifies pieces of data as part of the same communication

•     ensures that data pieces can be directed to the correct receiving end device

3   

What is a primary function of the trailer information added by the data link layer encapsulation?

•     supports error detection

   

4   

Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"

•     an end device

   

5   

Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)

•     Network B -- WAN
•     Network C -- LAN
•     Network A -- LAN

6   

Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)

•     Physical
•     Data Link

   

7   

What is the purpose of the TCP/IP Network Access layer?

•     the division of segments into packets

8   

Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?

•     multiplexing

   

9   

What can be identified by examining the network layer header?

•     the destination host address

   

10   

Select the statements that are correct concerning network protocols. (Choose three.)

•     define the structure of layer specific PDU's
•     outline the functions necessary for communications between layers
•     require layer dependent encapsulations

11   

Refer to the exhibit. Which term correctly identifies the device type that is included in the area B?

•    intermediary

12   

Which statements correctly identify the role of intermediary devices in the network? (Choose three.)

•     determine pathways for data
•     retime and retransmit data signals
•     manage data flows

   

13   

Refer to the exhibit. What type of network is shown?

•     LAN

   

14   

What is the primary purpose of Layer 4 port assignment?

•     to identify the processes or services that are communicating within the end devices

15   

During the encapsulation process, what occurs at the data link layer?

•     The physical address is added.

   

16   

What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?

•     application, presentation, session, transport, network, data link, physical

   

17   

Refer to the exhibit. Which set of devices contains only end devices?

•     E, F, H, I, J

18   

What is a PDU?

•     a layer specific encapsulation

19   

Which layer encapsulates the segment into packets?

•     network

   

20   

Which characteristic correctly refers to end devices in a network?

•     originate data flow

21   

What device is considered an intermediary device?

•     switch

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Tips n’Trik Menghilangkan Tanda ShortCut di Desktop

Ini memang trik lama, bagi pecinta kerapian mungkin cara ini bisa sedikit membantu. Dengan cara ini anda dapat menghilangkan tanda shortcut “” di desktop anda. Jadi tampilannya desktop anda lebih bersih dari biasanya. Untuk Windows XP, sudah saya coba dan berhasil, cara nya:

  1. Masuk ke “START”-“RUN”-tulis “REGEDIT” 

  2. Lalu ke HKEY_CLASS_ROOT dan cari folder lnkfile (L kecil) bukan inkfile  

  3. Rename IsShortcut menjadi IsShortcuts (ada tambahan s)   

 

  4. Logg Off/Restart

SELAMAT MENCOBA ^_^

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