Mohammed is a network administrator. He needs to change the permissions of a network user to give them higher-level access. Which function of a network operating system (NOS) will allow Mohammed to do this?

1. managing user accounts
2. setting up a firewall
3. using an Ethernet cable
4. restarting the router

1. managing user accounts

The function of a network operating system (NOS) that will allow Mohammed to change the permissions of a network user to give them higher-level access is managing user accounts.

To access this function, Mohammed will need to log in to the network operating system with administrative privileges. Once logged in, he can navigate to the user account management section, where he will be able to modify the permissions and access levels assigned to individual network users.

In this section, Mohammed can add, remove, or modify user accounts, assign different levels of access and permissions, set password requirements, and manage other user-related settings. By adjusting the permissions for a specific user, he can grant them higher-level access to the network resources and functionalities they require.

The correct answer is 1. managing user accounts.