Abstract: A communication device includes a method storage and a controller. The method storage stores method information indicating access control methods usable by the communication device. The indicated access control methods include a configured control method that is currently set to be used by the communication device, and a candidate control method that is a candidate for the configured control method. The controller sends a request for server method information indicating one or more server control methods supported by a first server, to the first server. The controller receives a response including the server method information from the first server via the communication interface. The controller outputs first output information to prompt a user to change the configured control method to the candidate control method, in a case where a change condition is satisfied that includes a condition that the one or more server control methods include the candidate control method.

Abstract: A communication apparatus may form a first wireless network so as to establish a wireless connection with a first external apparatus, in a case where a first wireless connection request is obtained from the first external apparatus and it is determined that a connection number has not reached an upper limit. The communication apparatus may newly form a second wireless network while maintaining a state of the first wireless network being formed, so as to establish a wireless connection with a second external apparatus, in a case where a second wireless connection request is obtained from the second external apparatus in the state of the first wireless network being formed and it is determined that the connection number has not reached the upper limit. In the first and second wireless networks, the communication apparatus may be configured to operate as a parent station.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A communication device may send a first negotiation request including first version information to a first external device via a communication interface of the communication device, execute first communication with the first external device via the communication interface by using the predetermined communication protocol of a second version, send a second negotiation request including second version information to the first external device via the communication interface in a case where an error notification is received from the first external device in the first communication, and execute second communication with the first external device via the communication interface by using the predetermined communication protocol of the first version.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A communication apparatus includes a processor and a memory. The memory stores computer-readable instructions therein. The computer-readable instructions, when executed by the processor, causes the communication apparatus to perform: transmitting to a first external apparatus, which is connected to the communication apparatus via Internet, a request to request data transmission while the communication apparatus functions as a client and the first external apparatus functions as a server; after transmitting the request, receiving specific data as a response to the request from a second external apparatus which is connected to the communication apparatus via the Internet while the second external apparatus functions as a client and the communication apparatus functions as a server; and executing a specific process related to security after receiving the specific data.

Abstract: A communication apparatus may form a first wireless network so as to establish a wireless connection with a first external apparatus, in a case where a first wireless connection request is obtained from the first external apparatus and it is determined that a connection number has not reached an upper limit. The communication apparatus may newly form a second wireless network while maintaining a state of the first wireless network being formed, so as to establish a wireless connection with a second external apparatus, in a case where a second wireless connection request is obtained from the second external apparatus in the state of the first wireless network being formed and it is determined that the connection number has not reached the upper limit. In the first and second wireless networks, the communication apparatus may be configured to operate as a parent station.

Abstract: A communication device may send a first negotiation request including first version information to a first external device via a communication interface of the communication device, execute first communication with the first external device via the communication interface by using the predetermined communication protocol of the second version, send a second negotiation request including second version information to the first external device via the communication interface in a case where an error notification is received from the first external device in the first communication, and execute second communication with the first external device via the communication interface by using the predetermined communication protocol of the first version.

Abstract: A communication apparatus may form a first wireless network so as to establish a wireless connection with a first external apparatus, in a case where a first wireless connection request is obtained from the first external apparatus and it is determined that a connection number has not reached an upper limit. The communication apparatus may newly form a second wireless network while maintaining a state of the first wireless network being formed, so as to establish a wireless connection with a second external apparatus, in a case where a second wireless connection request is obtained from the second external apparatus in the state of the first wireless network being formed and it is determined that the connection number has not reached the upper limit. In the first and second wireless networks, the communication apparatus may be configured to operate as a parent station.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A communication device includes a first interface configured to perform communication using a first network and a second interface configured to perform communication using a second network. The communication device is configured to generate a first server certificate including first device information for identifying the communication device in the first network and a second server certificate including second device information for identifying the communication device in the second network, receive a communication request, execute communication with the first specific device through the first interface by using the first server certificate in a case where the communication request is received from a first specific device through the first interface, and execute communication with the second specific device through the second interface by using the second server certificate in a case where the communication request is received from a second specific device through the second interface.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: A communication apparatus may establish a first wireless connection with a terminal apparatus by using first wireless information under a state where the communication apparatus operates in the first operation mode, and receive setting information by using the first wireless connection so as to store the setting information in a setting area. The communication apparatus may establish a second wireless connection with the terminal apparatus by using second wireless information under a state where the communication apparatus operates in a second operation mode, store the second wireless information in a connection history area, and re-establish the second wireless connection with the terminal apparatus by using the second wireless information stored in the connection history area under a state where the communication apparatus operates in the second operation mode after the second wireless connection has been disconnected.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.

Abstract: The invention provides an ion-trapping agent for a lithium-ion rechargeable battery, which traps impurity metal ions generated from constituent parts of a lithium-ion rechargeable battery with high selectivity, has high adsorption capacity per unit mass, suppresses the occurrence of short circuit derived from impurities, and renders a liquid neutral such that the lithium-ion rechargeable battery is unlikely to influence an electrolyte solution, thereby imparting a long-life lithium-ion rechargeable battery.

Abstract: A communication apparatus includes a processor and a memory. The memory stores computer-readable instructions therein. The computer-readable instructions, when executed by the processor, causes the communication apparatus to perform: transmitting to a first external apparatus, which is connected to the communication apparatus via Internet, a request to request data transmission while the communication apparatus functions as a client and the first external apparatus functions as a server; after transmitting the request, receiving specific data as a response to the request from a second external apparatus which is connected to the communication apparatus via the Internet while the second external apparatus functions as a client and the communication apparatus functions as a server; and executing a specific process related to security after receiving the specific data.

Abstract: A communication apparatus may obtain a first wireless connection request from a first external apparatus, determine whether a connection number has reached an upper limit, supply first wait information to the first external apparatus in a case where it is determined that the connection number has reached the upper limit, and newly form a second wireless network which is different from a first wireless network to which both of the communication apparatus and a specific external apparatus had belonged, so as to establish a wireless connection with the first external apparatus, in a case where a wireless connection between the communication apparatus and the specific external apparatus is disconnected after the first wait information is supplied to the first external apparatus. In the first and second wireless networks, the communication apparatus may be configured to operate as a parent station.

Abstract: A printing system includes a terminal apparatus and a printing apparatus. The terminal apparatus includes: a first inputting section; and a processor configured to: transmit a print request for printing an object image indicated by object data to the printing apparatus; receive first input authentication information inputted by a user; and transmit the first input authentication information to the printing apparatus.