The IT Stuff

A unicast packet has a single source IP address and a single destination IP address.A multicast packet has a single source IP, but it has a multicast destination IP address that will be delivered to a group of receivers.
In Multicast multiple hosts can receive the same multicast stream (instead of individual streams) to save bandwidth.
Internet [...]

System & Service monitoring

Reachability, availability

Resource measurement/monitoring

Capacity planning, availability

Performance monitoring (RTT, throughput)‏

Statistics & Accounting/Metering

Fault Management (Intrusion Detection)‏

Fault detection, troubleshooting, and tracking

Ticketing systems, help desk

Change management & configuration monitoring

Not Cover by the Network management

Provisioning
Processes associated with allocation and configuration of resources.
Security aspects in depth
Basic security comes from proper administration and management of your network.

Category-6 cable, commonly referred to as Cat-6, is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e and Category 3 cable standards.
Cat-6 give good control over crosstalk and system noise.
Cat-6 cable standard provides performance of up to 250 MHz and is suitable for 10BASE-T / 100BASE-TX [...]

TCP is the most common transport layer protocol. It is used by many application layer protocols like the HyperText Transfer Protocol (HTTP) and FTP.TCP is connection oriented and it  maintains information about buffers, windows, and other resources to count segments and track lost segments.
When a normal TCP connection starts, a destination host receives a SYN [...]