As we know, Cisco is the worldwide leader in IT and networking.
As a leading networking device pioneer, Cisco has a lot to do with many nouns. Today we are going to introduce some common ones.Cisco Systems, Inc. (known as Cisco) is an American multinational technology conglomerate headquartered in San Jose, California, in the center of Silicon Valley, that develops, manufactures and sells networking hardware, telecommunications equipment and other high-technology services and products.
The first one is CCIE. You must be familiar with this noun if you are a networking learner.
CCIE, The Cisco Certified Internetwork Expert, is a technical certification offered by Cisco Systems. The Cisco Certified Internetwork Expert (CCIE) and Cisco Certified Design Expert (CCDE) certifications were established to assist the industry in distinguishing the top echelon of internetworking experts worldwide and to assess Expert-level infrastructure network design skills worldwide.
Familiar to CCIE, CCNP(Cisco certified network professional) and CCNA(Cisco Certified Network Associate) are IT certification from Cisco. There are CCDA(Cisco Certified Design Associate), CCDP(Cisco Certified Design Professional), CCSP(Cisco Certified Security Professional), CCIP((Cisco Certified Internetwork Professional) and so on.
The second one is VPN–A virtual private network. Extending a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running across the VPN may therefore benefit from the functionality, security, and management of the private network.
The figure following shows the working principle of VPN.
The next is LAN and WAN. A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network(WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits or Internet links. An even greater contrast is the Internet, which is a system of globally connected business and personal computers.
IOS–Internetwork Operating System, is a family of software used on most Cisco Systems routers and current Cisco network switches. IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. The same to IOS, NX-OS is also an operating system, but it’s only for the Nexus-series Ethernet switches and MDS-series Fibre Channel storage area network switches made by Cisco Systems.
And SSL–Secure Socket Layer. Cisco SSL Appliances decrypt secure socket layer (SSL) traffic and send it to existing security and network appliances to transparently enable encrypted traffic inspection. This allows existing intrusion prevention system (IPS) appliances to identify risks normally hidden by SSL, such as regulatory compliance violations, viruses, malware, data loss, and intrusion attempts.
IP sec–IP security. IPsec is a robust, standards-based encryption technology that enables your organization to securely connect branch offices and remote users and provides significant cost savings compared to traditional WAN access such as Frame Relay or ATM.
POE– Power over Ethernet. PoE is the ability to deliver 48 VDC of power over the same copper cable as Ethernet. Two primary elements are required in order to implement PoE.
·power sourcing equipment (PSE)—the LAN switch or source power delivered over Ethernet
·the powered device (PD)—the end device that accepts and uses power from the Ethernet cable for its operation
802.11ac, a wireless networking standard in the 802.11 family, developed in the IEEE Standards Association process, providing high-throughput wireless local area networks (WLANs) on the 5 GHz band.
And the last is multigigabit technology. Cisco Catalyst Multigigabit Technology is a unique Cisco innovation to the new Cisco Catalyst Ethernet Access Switches. With the enormous growth of 802.11ac and new wireless applications, wireless devices are driving the demand for more network bandwidth. This creates a need for a technology that supports speeds higher than 1 Gbps on all cabling infrastructure. Cisco multigigabit technology allows you to achieve bandwidth between speeds of 1 and 10 Gbps over traditional Cat 5e cabling or above. In addition, the multigigabit ports on select Cisco Catalyst switches support Universal Power Over Ethernet (UPOE), which is increasingly important for next-generation workspaces and Internet of Things (IoT) ecosystems.