Quiz về Hệ thống IoT và Mạng

What are the characteristics of current IoT systems?

• Current IoT systems are usually well-secured

• All devices in the IoT system have the same operational purpose and mechanism

• Most devices in IoT systems have diverse configurations and operational mechanisms, making it inconvenient to install security tools. Security is a weakness that needs to be addressed in current IoT.

• Most devices in IoT systems have advanced and powerful configurations

Which statement is false when describing DNS Server?

• When the browser needs to find the IP address corresponding to a domain name, it will ask the DNS Server

• Upon receiving a Recursive query from the client, if the DNS Server cannot find the required domain name in its database, it will send a NAK message back to the client. The browser will then display a message that the website is currently inaccessible.

• The task of the Root Name Server is to return the address of the DNS Server managing national-level domain names, after which this server will respond to the Local name server

• Upon receiving a Recursive query from the client, the DNS Server is responsible for sending back a Response query

Which statement correctly describes a self-sufficient LAN?

• The network is built to provide the necessary services for the agency

• It is still in use today even though many places have switched to Cloud

• It is the next step in the development of Grid Computing technology

• It existed before Cloud Computing was born

Which statement is false?

• Switch uses point-to-point transmission method

• Broadcast transmission method increases the likelihood of collision

• Point-to-point transmission method limits the likelihood of collision

• Hub uses point-to-point transmission method

Which statement is false when describing IP telephone systems?

• No need to use telephone lines to transmit voice

• Voice is transmitted over the network

• The IP address is a server on which softphone software is installed

• Workstations can be IP telephones

• Workstations can be regular PCs with softphone software added

Assuming we divide the process of sending an email from A to B into the following steps: (1) User Agent A sends the email to A's Mail server, (2) the email is sent to B's Mail server, (3) B retrieves the email from the server. Which statement is false when describing email services?

• All 3 steps must be performed immediately, otherwise the whole process fails

• The email system must perform step (2) very quickly within a few seconds

• The email system must perform step (1) very quickly within a few seconds

• Step (3) may not be performed immediately

Which is a network application?

• Gmail

• Turnitin

• Adobe Acrobat

• MS.Excel

• Web browser

Which statement is false when describing the Domain Name System (DNS)?

• Abbreviated as DNS, fully written as Domain Name System

• Because IP addresses are long and hard to remember, DNS is needed

• Because domain names are long and hard to remember, DNS is needed to translate

• It has the task of converting domain names to corresponding IP addresses and vice versa

Which statement is false when describing Edge computing?

• Reduces the amount of data that needs to be transmitted, reducing interdependence among components in the system by distributing load and zoning appropriately, handling data errors.

• Pre-processes to reduce the size of data before transmission

• In the traditional Cloud model, all data must be sent over the Internet to the computing center, then the results are sent back, leading to information security loss

• No more Data Center

• Helps process some data on-site where it is generated

Which statement is false when describing Edge Computing?

• Compromises data security due to the data pre-processing step before transmission

• Causes transmission delay due to the data pre-processing step at the source before uploading to the Cloud

• Processes on-site and immediately returns results for simple tasks or tasks that must be processed