GregSowell-intro-networking.pdf

GregSowell.com

Intro to Networking

Mikrotik/Cisco

GregSowell.com

Terms Used

• Layer X – When I refer to something being at layer X I’m

referring to the OSI model.

• VLAN – 802.1Q Layer 2 marking on traffic used to

segment sets of traffic. VLAN tags are applied on

access ports.

• Trunk – I’m referring to an 802.1Q trunk port. This is a

method to transmit frames across an L2 link with a VLAN

tag intact.

• Outside/Inside – Outside refers to the interface

connecting you to the Internet where as Inside refers to

the interface connecting you to the LAN side of your

router. I’ll use these terms most often when talking

about NAT.

GregSowell.com

• NAT/PAT – Network Address Translation. This

take a private address (RFC1918) and

translates it to a publically routable IP. Port

Address Translation is a method to translate

multiple private addresses to a single public IP

(masquerade).

• DHCP – Dynamic Host Configuration Protocol –

Auto assign IP on hosts. TCP port 67.

• NTP – Network Time Protocol. Synchronizes

your system time to an external time server.

• Bridging – Refers to layer 2 connectivity

between multiple ports.

GregSowell.com

OSI Model - 7 Layers

• 7 – Application – Interact directly with Apps

(FTP, HTTP, SMTP)

• 6 – Presentation – Formats data (encryption)

• 5 – Session – Controls connections between

computers

• 4 – Transport – TCP/UDP – ports - Segment

• 3 – Network – IP addressing - Packet

• 2 – Data Link – MAC addressing - Frame

• 1 – Physical - Electricity

GregSowell.com

L7 - Application

•HTTP.

•SNMP.

•SMTP.

• Interacts directly with your applications.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: