2.0 Networking

20/21

file transfer protocol

FTP

same as OS

22-SSH

remote CMD

23-telnet

never us

-block at firewall

25-

simple mail transfer

simple mail transfer=SMTP

sending emails

53

Domain name system

Domain host system=DNS

resolves name to IP adderss

Dynamic protocall configuration protocol=DHCP

67/68

-auto assign IP

Hypertext transfer protocol=HTTP

80

-websites

lNET-BIOS

-137/139

-legacy

IMAP=Internet mail access

Receving

synchronize

SNMP

info about network

LDAP

Managing donnais

HTTPS

Encrypt data to websites

SMD/CIFS

file transfer to differnt OS

RDP

GUL,windows

Connectionless

UDP

-streaming

DHCP

Broadcasting

connection oriented

TCP

-money banking

routers

gateway

-Lan=WAN

-ip Adress

Switchese

LAN

-Mac Adress

Managed

Changes settingd

VLan

Unmanaged

can’t change settings

plug n Play

access points

wifi access

patch panel

orgnize ethernet

front has RJ 45

back has punch down block

Firewall

ACL block or allows=domains,IP adderss and port

POE injectors

add electrical power

POE switch

can have injector port

PoE standerds

802.3

-af.at.bt

cable modem

coax

-f-type

-coax to etherent

NIC

Gives MAC

SDN

control network hardware through clouds

DSL

RJ11

-RJ45

-port

ONT

Fiber motem

2.4GHz

Larger range

-slower

5GHz

short range

faster

bluetooth

2.4GHz

PAN

channels

2.4 channels

-1,6,11

ac

5GHz

b

2.4GHz

n

2.4GHz

mimo

ac

only 5GHz

az(wifi 6)

2.4

5.6GHz

ac,ax

gigabits and above

long rang wireless

microwaves

-line of sight

License

pay for channel

Unlicensed

anyone can use it,

regulatory requirements for wireless power

power limits

NFC

active requires power (phone or tap to pay)

RFID

passive, ID badge,smartphone

server roles

router address on alternate

mail server

SMTP,POPs, IMAP

syslog

history of event on server

Web server

HTTP,HTTPS

AAA

RADIUS,TACACST

spam gateway

block spam emails

unfied threat management

Security

UTM=unified threat managment

firewall,proxey, antivirus IDs and IPs

loaded balancer

spread internet trafic to all web server

proxey server

redriction,content reltering

branch cache improve the speed of the network

SCADA

OT

LoT

Smart home devices

IPv4

4 octets

32 bit of data

Private addresses

LAN

Public

WAN

IPv6

Hexadecimal

colens separating segment

starts with 2 or 3 for public

static

Manually assign IP address

Dynmic

auto assignment with DHCP

Gateway

router IP

APIPA

169.254.0., something went wrong with DHCP

A

IPv4

AAA

1pv6

MX

translate email server name tolp

DKIM

cryptophraphy

SPF

sender,filter out domain name

DMARC

both SPF,

DKLM together