Network+ : Networking Variants, Physical Installation

  1. Network+ Certification
  2. Network+ Certification – Introductions and Resources
  3. Network+ : From Physical Topologies to Media and Network Devices
  4. Network+ : Networking Variants, Physical Installation
  5. Network+ : TCP/IP and Network Operations
  6. Network+ : Network Naming and Sharing Resources
  7. Network+ : IPv6
  8. Network+ : Remote, Secure and Cross-Platform Networking
  9. Network+ : Servers and Support
  10. Network+ : WiFi
  11. Routing and Firewalls
  12. Network+: Routing Protocols
  13. Network+: Network Monitoring

Day 3: Networking Variants, Physical Installation

Ports

https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml

“Exotic” or Large-Scale Network Protocols

FDDI and CDDI
ATM
Frame Relay
MPLShttps://duckduckgo.com/?q=mpls&t=ffab&iax=images&ia=images
Metro Ethernet

Installation

Structured Cabling

Fire Ratings

Equipment Rooms

Equipment Racks: 19″, “U” units

Patch Panels

Patch Cables

EIA/TIA 606

Floor Plans

Pulling

Testing

Tools

Punchdown tool

punchdown tool
punchdown tool

Crimping tool

crimping tool
crimping tool

Toner

TD

OTDR

certification tools

Fluke

Wired Networking: How You Get Connected

What Happens During the Boot Process:

1. Push power

2. POST runs

3. BIOSes get read into RAM

4. NIC BIOS gets read into RAM

5. Every NIC has a MAC address (48 bits, Hex) like:

01:23:45:67:89:ab

6. The NIC sends out a frame FROM: its MAC, TO: Broadcast (BC)

Ethernet Broadcast Address is:

ffffffffffff (note that this is 48 1s)

0000 = 0

0001 = 1

1111 = f

7. The switch it’s connected to hears the BC, and registers the new MAC address to the physical port it’s plugged into.

8. IN OLD NETWORKS (DOS, Windows 95/98, Windows NT3.x):

i. The Local Browse Master for NetBEUI/NetBIOS hears the initial NIC BC, and

ii. Registers the host’s NetBIOS name and MAC address to the local Workgroup.

9. IN CONTEMPORARY NETWORKS:

a. NIC BCs to the IP BC address: ipv4 address is 32 bits, IN DECIMAL

The IP BC is:

255.255.255.255 (note that this is 32 1s)

b. DHCP gives me

IP

NM

GW

NS

DDNS

Wireless Networking

Wireless NICs

Access Points (APs)

Wireless Bridges: Point to Point / Point to Multipoint

Wireless Networking Software

Modes: Ad-hoc vs. Infrastructure

BSSID: Basic Service Set ID (the WAP’s MAC)

SSID: Service Set ID (the network name with a single WAP)

ESSID: Extended Service Set ID (the network  name for a network with multiple WAPs)

CSMA/CA

Wireless Networking Security

802.1x (usually using RADIUS)

MAC Filtering

WEP

64 bit encryption
Shared, static key

WPA

128 bit encryption
Key variants: Enterprise 802.1x vs. Personal PSK

WPA2

WPA3

WPS (DANGER DANGER!!)

Exercise:

WAP Configuration