Cyber NetSec

                                ICMP ICMP  (Internet Control Message Protocol) is an error-reporting protocol network devices like routers use to generate error messages to the source IP address when network problems prevent delivery of IP packets. ICMP  has no  ports  and is neither TCP nor UDP.  ICMP  is IP protocol The Internet Control Message Protocol ( ICMP ) is a network layer protocol  used by  network devices to diagnose network communication issues.  ICMP  is mainly  used to  determine whether or not data is reaching its intended destination in a timely manner. Internet Control Message Protocol ( ICMP ) is one of the protocols of the TCP/IP suite. The  ICMP echo request  and the  ICMP echo  reply messages are commonly known as ping messages. ... The ping command sends an  ICMP echo request  to a device on the n...

                                                      VLAN              VLAN  is a group of devices on one or more LANs that are configured to communicate as if they were attached to the same wire, when in fact they are located on a number of different LAN segments. Because  VLANs  are based on logical instead of physical connections, they are extremely flexible.                It is a set of end stations and the switch ports that connect them. ... Like a bridge, a  VLAN  switch forwards traffic based on the Layer 2 header, which is fast. Like a router, it partitions the network into logical segments, which provides better administration, security, and management of multicast traffic.      ...

  Configure and verify IPv6 addressing and prefix IPv6      IPv6 is the newest version of the IP protocol. IPv6 was developed to overcome many deficiencies of IPv4, most notably the problem of IPv4 address exhaustion. IPv4, which has only about 4.3 billion (2 to the power of 32) available addresses, IPv6 allows for 3.4 × 10 to the power of  38 addresses. IPv6 features Here is a list of the most important features of IPv6: Large address space:  IPv6 uses 128-bit addresses, which means that for each person on the Earth there are 48,000,000,000,000,000,000,000,000,000 addresses! Enhanced security:  IPSec (Internet Protocol Security) is built into IPv6 as part of the protocol . This means that two devices can dynamically create a secure tunnel without user intervention. Header improvements:  the packed header used in IPv6 is simpler than the one used in IPv4. The IPv6 header is not protected by a checksum so routers do not need to calculate ...

    FortiGate Firewall(Virtual Machine) Download and Configuration

  Network topology architectures

What Are Network Devices and What Do They Do? When you sit down to get something done on your computer, you may not realize it but you're relying on more than your Internet browser to get information, go shopping or send emails. You're also relying on having an IP address that recognizes your computer, as well as a reliable network that you're connected to—and that can connect with everyone else. And that's what makes the "connectivity" possible. Networks are more than computers and wiring. There also have to be specific devices—specialized pieces of hardware—that handle electrical/digital connections and perform their unique roles efficiently.   The network components are used to build a perfect network infrastructure for any organization or office and etc.The Devices are available in different range (Config.& Price also) The following Devices are Hubs Switches Bridges Routers Gateways CSU/DSU Network interface cards (NICs), ISDN adapters, and system a...