Kiến thức về mạng và bảo mật

In peer-to-peer (P2P) network architecture, which of the following characteristics is correct?

• Peers do not need to connect to each other.

• Peers can frequently change their IP addresses.

• Peers cannot communicate directly with each other.

• Peers can only use the HTTP protocol.

Which of the following statements is incorrect?

• Active Directory Certificate Services can be used to secure Web Server on Windows Server 2016.

• Active Directory OU (organizational unit) is a container used to organize objects in a domain into logical management groups.

• View CPU information of the machine through the command cat /proc/info on CentOS 9 operating system.

• Vi is an editor available on Unix/Linux operating systems. Vi is often used to create and edit configuration files on Linux.

Which of the following statements is correct?

• Bluetooth network covers a wide area, extending for tens of kilometers.

• The main function of Routers is to store and manage network applications.

• HTTP is a state protocol for sending emails.

• Wireless LAN (WiFi) has data transmission speeds from 10 to hundreds of Mbps and operates within a few dozen meters.

What does RFC (Request for Comments) published by IETF (Internet Engineering Task Force) refer to?

• Standards and technical guidelines that are publicly available to support the development and use of the Internet.

• Regulations on security and network resource management.

• Protocols and software used to maintain the operation of the Internet.

• Policies and regulations of international organizations related to the use of the Internet.

What is correct when talking about access rights to resources on Linux Server?

• Read permission allows reading the content of files and viewing the contents of directories using the ls command.

• Execute permission only allows executing programs. This permission does not apply to directories.

• Execute the ls command to view the display of access rights on directories and files.

• All A, B, C are correct.

How do delay and packet loss occur in the network?

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How does delay and packet loss occur in a network?

• When packets wait to be transmitted, they are queued in the router's buffer.

• The queue length increases when the incoming speed temporarily exceeds the outgoing bandwidth.

• Packet loss occurs when the memory allocated for packets in the queue is full.

• All of A, B, C are correct

Which statement is correct when talking about Socket in computer networks?

• Each socket is identified by a pair of IP addresses and port numbers, and they act as a bridge to send and receive data between processes on network devices.

• A service that stores data on the server.

• A protocol to protect data during transmission.

• Regulations on security and network resource management.

Which network protocol provides a mechanism for traffic control to prevent network congestion?

• UDP

• TCP

• SMTP

• FTP

The characteristic of full-duplex mode in communication in computer networks allows:

• To transmit data in one direction only.

• To transmit data simultaneously in both directions.

• To receive data only.

• Cannot transmit data.