ccna 200-301 exam name

ccna 200-301 exam name.The phrase "Necessity is the mother of invention" is perfectly suited to network security. In the early days of the Internet, commercial interests were negligible and the vast majority of users were researchers and developers. No security measures were implemented at this time, but early users would do little that could harm other users.In the early days, network connectivity consisted of connecting people and machines through a communication medium. The job of networkers was to connect devices to improve the ability of people to exchange information and ideas. Early Internet users did not spend much time considering whether their online activities posed a threat to the network or to their own data.When the first viruses were released and the first DoS attacks occurred, the world of the network practitioner began to change. To meet the needs of their users, cyber practitioners learned techniques to secure their networks. Many network practitioners were primarily concerned with designing, building, and growing networks to protect existing networks.Today, the Internet is a very different place than it was when it first emerged. More and more people rely on the Internet for their personal, financial, and business needs. This information must be protected. However, attack tools are also quite sophisticated and highly automatable, and one does not need a lot of technical knowledge to use them.A cybersecurity practitioner's job includes ensuring that the right people are proficient in cybersecurity tools, processes, skills, protocols and techniques. It is critical that cybersecurity practitioners manage the ever-changing cyber threat.1.1.1.3 Evolution of cybersecurity toolsAs cybersecurity has become an integral part of daily operations, devices have emerged for specific cybersecurity functions. One of the earliest network security tools was the IntrusionDetectionSystem (IDS), developed by Stanford International Research Institute in 1984IDS was first developed in 1984. IDS provides real-time detection of specific types of attacks as they occur. This detection allows network security practitioners to more quickly mitigate the negative effects of these attacks on network devices and users. In the late 1990s, Intrusion Prevention Systems or Sensor (IPS) began to replace IDS solutions. IPS devices are able to detect malicious activity and can automatically block attacks in real time.In addition to IDS and IPS solutions, firewalls were also developed to provide perimeter security by blocking unwanted traffic from entering defined areas within the network. o In 1988, Digital Equipment Corporation (DEC) created the first network firewall in the form of a packet filter. first network firewall in the form of a packet filter. These early firewalls examined packets to see if they matched a pre-set set of rules and could choose to forward or discard packets accordingly. Packet filtering firewalls examined each packet individually, but did not check whether a packet belonged to an existing connection. In 1989, AT&T Bell Labs developed the first stateful firewall (statefulfirewall). o Like packet filtering firewalls, stateful firewalls use predefined rules to allow or deny traffic. Unlike packet-filtering firewalls, stateful firewalls track established connections and determine whether a packet belongs to an already existing stream, thus providing greater security and faster processing.The original firewalls were software features added to existing network devices (e.g., routers). Over time, some companies developed standalone or dedicated firewalls that eliminated the need for the memory required to filter packets and the processor-intensive activities involved in filtering packets from routers and switches. Cisco's Adaptive Security Appliance (ASA) can be used as a standalone context-aware firewall. For companies that do not need to use a dedicated firewall, a modern router, such as the Cisco Integrated Services Router (ISR), can be used as a sophisticated stateful firewall.