Networks
91 questions · IT Passport · 51–91
Which of the following is an appropriate description concerning the role of a DNS server?
Which of the following is an appropriate combination of protocols that e-mail software uses for sending and receiving e-mail?
Which of the following is an appropriate description concerning the Bcc field in entering the destinations of an e-mail?
Which of the following is the appropriate combination of words to be inserted into blanks A and B in the description below concerning LPWA that is used in IoT devices?
The characteristics of the wireless communication methods classified as LPWA are that their communicable range is A than that of a wireless LAN, and that they consume B power than the fourth-generation mobile communication standard (4G).
Which of the following is included in the Bluetooth standard and achieves power-saving communication between devices?
Which of the following is one of the specifications added to Bluetooth, has excellent power saving characteristics that enable an IoT system to be operated for a long period, and is also used to find the distance between transmitting and receiving devices?
Which of the following is an appropriate description concerning the function of an HTTP proxy server?
Which of the following is an appropriate role of FTP, which is a protocol used in a TCP/IP network?
The notation RSS is sometimes seen on websites and other such places. Which of the following is an appropriate explanation of this RSS?
Which of the following is the appropriate combination of words to be inserted into blanks A and B in the description below concerning radio waves used for mobile phones?
Radio waves have the property that the A the frequency, the more easily they go around obstacles and the more easily they reach even behind obstacles. Among the frequencies used for mobile phones in Japan, the frequency band from the 700 B band to the 900 B band is called the platinum band because, among other reasons, it has this property and connects easily.
Which of the following is an appropriate description of a domain name that is used on the Internet?
Which of the following is located between an internal network of a company, etc. and the Internet, and accesses web servers on the Internet on behalf of PCs on the internal network in order to ensure security?
Which of the following is a technology that is also used in IoT area networks, and that achieves communication over a wide area by communicating in a relay manner, in which wireless communication from an IoT device is repeatedly relayed by other IoT devices?
When one (1) server that is connected to the Internet provides both an e-mail sending and receiving function and a Web access function, which of the following is used by an application program on a terminal to specify to the server which of these functions it uses?
Which of the following achieves higher positioning accuracy by taking an orbit that stays over a specific region for a relatively long time and by being used together with GPS, so that positions can be measured even in places where it is difficult to catch GPS radio waves, such as between tall buildings and in narrow alleys?
Which of the following is a technology that is also used in IoT area networks and that uses power lines also as a transmission path by superimposing high-frequency communication signals on the power lines that supply electricity and transmitting them?
Which of the following is one of the protocols for receiving e-mails from a mail server, and has the following characteristics?
Which of the following is an appropriate description concerning the text format and the HTML format that are used for outgoing messages and are specified when an e-mail is created?
BLE, which is used for communication in IoT area networks and other such purposes, is a specification that was added in Bluetooth 4.0. Which of the following is an appropriate description concerning BLE?
What is the name for a business operator that borrows the infrastructure of mobile communication services from another company and provides mobile communication services with smartphones and SIM cards under its own brand?
There is a temperature and humidity management system that consists of IoT devices, IoT gateways, and an IoT server. Which of the following is an appropriate specification of low-power wireless communication that is used to connect an IoT device and an IoT gateway installed near it?
Mail software has been newly installed on a PC. Which of the following corresponds to a protocol that needs to be set up at that time?
Which of the following is the most appropriate content that is displayed by an RSS reader used in blog services?
Which of the following is an appropriate description concerning domain names used on the Internet?
Which of the following is a technology that is also used for supplying power to IoT devices, and that collects tiny amounts of energy such as light and heat (temperature differences) from the surrounding environment and converts it into electric power?
Which of the following is an appropriate description concerning the technologies that are used in IP telephony?
VPNs that use TCP/IP as the communication protocol include an Internet VPN, which uses the Internet, and an IP-VPN, which uses a telecommunications carrier's own network. Which of the following cannot be done with an Internet VPN but can be done with an IP-VPN?
Which of the following is the appropriate combination of terms to be inserted into blanks A and B in the description concerning websites?
The mechanism in which a website provider has data temporarily stored on a user’s PC via a Web browser is called A. By using this, it becomes possible to identify the user. The format in which metadata, such as the headings and summaries of a website, is described in a structured way is called B. By using this, users can be notified of update information of the website.
Among the descriptions concerning wireless LANs, which of the following lists all and only the appropriate ones?
Which of the following is an appropriate mechanism by which a terminal such as an IoT device or a smartphone obtains its own location information by using the GPS function installed in the terminal?
When Mr. A sends an e-mail addressed to Mr. X, he has decided to also send it to Mr. Y and Mr. Z for reference. However, he does not want Mr. X and Mr. Y to know that it was sent to Mr. Z. Which of the following is an appropriate combination of destinations to be specified in this case?
On a communication line where the transmission speed is 20 Mbps (bits/second) and the transmission efficiency is 80%, how many seconds does it take to transmit 1 Gbyte of data? Here, 1 Gbyte = 103 Mbytes.
In building an IoT area network, the use of communication standards ① through ③ is being considered. When these communication standards are classified into wired and wireless, which of the following lists all and only those that are classified as wireless networks?