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14 - Secure Network Components - Overview - Coggle Diagram
14 - Secure Network Components - Overview
Network areas
Intranet: for internal services
Extranet: to reach services for external workers
Screen subnet: semi-public network area surrounded by 2 firewalls
Secure Operation of Hardware
Redundant power supplies = 2 independent power suppliers with 50% each, so that they can both take over 100% if one fails
Common Network Equipment
LAN Extenders
Aka WAN switch
Jumpbox/jumphost/bastion host
Remote access system to make accessing a specific system easier
Routers
(OSI layer 3)
Used to control traffic flow on networks and to interconnect networks
Sensors
e.g. fog computing, ICS, IoT, IDS/IPS, SIEM
Switches
(OSI layer 2)
Manage the transmission of frames via MAC address
Create separate broadcast domains when used to create VLANs
Can operate at OSI layer 3 with additional features (L3 switch)
Collector
Gather data into a log or record file
Bridge
(OSI layer 2)
Used to connect 2 networks
Aggregator
Type of multiplexor.
Example: MPLS
Modem (Modulator-Demodulator)
(OSI layer 1)
Communication device that covers or modulates between an analog carrier signal and digital information to support computer communications of PSTN lines
Hub
(OSI layer 1)
Connect multiple systems and network segments using the same protocol
Equivalent of a multiport repeater
OSI layer 1
Multiplexer (MUX)
(OSI layer 1)
Digital electronic device combining multiple input signals into a single output signal for transmission over a shared medium
Repeaters, Concentrators and Amplifiers (RCA)
(OSI layer 1)
Strengthen the communication signal over a cable segment