Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from Networking with Khalid, Tutor/Teacher, London.
Network professional and system administrator | CCNA R&S | CCNP R&S | CCNA Wireless | VPN,s | MikroTik Firewall | Cisco ASA Firewall | FortiGate Firewall | Virtualization vSphere ESXI | NVR CCTV |
11/06/2026
🚀 IT Support vs IT Administration
⚡ IT Support 💻
Handles user issues
Troubleshooting daily problems
Helpdesk role
⚡ IT Administration ⚙
Manages systems and servers
Configures networks
Maintains infrastructure
⚡ Key Difference 📊
Support fixes problems
Administration manages systems
Both roles keep IT operations running smoothly.
🚀 Router on a Stick
⚡ Single Interface 🌐
⚡ Multiple VLANs 🧩
⚡ Inter VLAN Routing 🔁
⚡ Trunk Connection 🔗
⚡ Efficient Design ⚡
Router on a stick allows communication between VLANs using one router interface with subinterfaces.
10/06/2026
🚀 How the Internet Works
⚡ Device Request 🌐
You enter a website
⚡ DNS Lookup 🔍
Domain converts to IP
⚡ Server Communication 📡
Request sent to server
⚡ Data Transfer 🔗
Packets travel across network
⚡ Routing 🔁
Routers find best path
⚡ Response 💻
Server sends data back
Internet works by sending data in packets between devices using protocols and routing paths.
10/06/2026
🚀 Medium Size Office Network Rack
⚡ Firewall 🔐
⚡ Core Switch 🔀
⚡ Access Switch 📡
⚡ Patch Panel 🔌
⚡ Cable Management 📊
⚡ Rack PDU ⚡
⚡ UPS Backup 🔋
⚡ Server or NAS 💻
A medium office rack organizes network devices for stable, secure, and easy to manage infrastructure.
10/06/2026
🚀 CCNA Routing Commands List
⚡ show ip route 🌐
View routing table
⚡ show ip interface brief 📊
Check interface status
⚡ show ip protocols 📡
View routing protocols
⚡ configure terminal ⚙
Enter config mode
⚡ ip route 🔁
Configure static route
⚡ router ospf 🔀
Start OSPF
⚡ network (OSPF) 🌍
Advertise networks
⚡ router eigrp ⚡
Start EIGRP
⚡ network (EIGRP) 📊
Add networks
⚡ router bgp 🌐
Start BGP
⚡ neighbor 🔗
Configure BGP peer
⚡ no shutdown 🔓
Enable interface
⚡ copy running config startup config 💾
Save configuration
These commands help configure and verify routing in Cisco networks.
09/06/2026
🚀 Switching Map
⚡ Switch 🔀
Connects devices in LAN
⚡ MAC Address Table 📊
Stores device MAC and port
⚡ Frame Forwarding 📡
Sends data to correct port
⚡ VLAN 🧩
Logical network segmentation
⚡ Trunk Link 🔗
Carries multiple VLANs
⚡ STP 🔁
Prevents loops
⚡ Port Security 🔐
Controls device access
Switching manages traffic efficiently inside local networks.
🚀 EIGRP vs OSPF
⚡ EIGRP ⚡
Hybrid protocol
Uses bandwidth delay
Fast convergence
Cisco proprietary
⚡ OSPF 🔀
Link state protocol
Uses cost metric
Open standard
Highly scalable
⚡ Key Difference 📊
EIGRP is simpler in Cisco networks
OSPF is widely used in multi vendor networks
Choose based on network size and environment.
09/06/2026
🚀 What is DNS
⚡ DNS 🌐
⚡ Domain Name System 📡
⚡ Name Resolution 🔍
⚡ Converts Domain to IP 📊
⚡ Faster Access ⚡
DNS translates human friendly domain names into IP addresses so devices can communicate on the network.
09/06/2026
🚀 NAT Types in Palo Alto Firewall
⚡ Static NAT 🔄
One to one mapping
Same IP always used
⚡ Dynamic NAT 🌐
Pool of public IPs
Assigned when needed
⚡ PAT Port Address Translation ⚡
Many devices use one public IP with different ports
⚡ Source NAT SNAT 🔁
Changes source IP for outbound traffic
⚡ Destination NAT DNAT 📡
Changes destination IP for inbound traffic
NAT controls how internal and external traffic is translated and secured in Palo Alto firewall.
🚀 CCNA Notes
⚡ Networking Basics 🌐
OSI TCP IP models
⚡ IP Addressing 📊
IPv4 IPv6 CIDR
⚡ Subnetting 📐
Network host calculation
⚡ Switching 🔀
VLAN STP EtherChannel
⚡ Routing 🔁
Static OSPF EIGRP BGP
⚡ Services 📡
DHCP DNS NAT
⚡ Security 🔐
ACL Port Security
⚡ Troubleshooting 🛠
ping tracert show commands
Quick CCNA notes for revision and strong fundamentals in networking.