CCNA registration-basic network knowledge-1-3

CCNA Authentication-basic network knowledge-1-3 ensures confidentiality by allowing intended and authorized recipients (individuals, processes, or devices) to read data to maintain data privacy. Use a powerful user authentication system, a password that is difficult to guess, and frequent password changes to restrict access to stored data on communication and Internet devices. Encryption of content ensures confidentiality and reduces unauthorized disclosure or information theft. Maintaining communication integrity data integrity means that the information will not be changed during transmission from the source address to the destination address. The sender's ID card is verified to ensure source integrity. The digital signature, hash algorithm, and verification mechanism can ensure the source integrity and data integrity throughout the network, thus preventing unauthorized information modification. Availability computer virus attacks and denial of service (Dos) attacks can make the network unavailable Dos attacks refer to external computers by sending a large number of service requests so that legitimate users cannot use network resources. Tools used to defend against viruses and server attacks include anti-virus software and firewalls on servers and desktops. These firewalls are routers and servers, they work with the "Gatekeeper" of the network to parse the traffic information in and out of the network. Create redundant network infrastructure to reduce the single point of failure that can cause network interruptions and reduce the impact of these threats. Network trends three main trends of networks: the number of mobile users is constantly increasing the number of devices with network functions is rapidly increasing the service scope is constantly expanding the number of mobile users is increasing, it has created a wireless service market with greater flexibility, coverage, and security. More powerful new devices have many devices that can connect to and use network services. The demand for networks is increasing. The service availability enhancement technology is widely recognized and the two factors of rapid innovation of network services promote each other, forming a spiraling situation. Therefore, it depends on the availability and reliability of the underlying network architecture. Users need more complex and reliable security services. The implementation of new technologies for job opportunities in the network industry is constantly changing the information technology field. Information Security Management Personnel of Network Architects: E-commerce software engineer database management