DNS Resolution Overview
Learn how the DNS resolution process enables network communication. What is DNS? The Domain Name System (DNS) maps IP addresses to hosts connected to either the public or private internet …
Category: Networking
CISCO Basic Command
Troubleshooting, Editing, Port #’s show ip interface brief (display interface designations, IP address and status) show ip route (display routing table) show vlan brief (on switch – show what VLANs …
Cheat Sheet for Python free PDF download
Basic Cheat sheet for Python free download Download Cheat sheet for Python
Network Security Basic
Security devices and Technologies1-Router2-Swtiches3-Firewall (NGFW)4-Content Security Firewalls5-IPS6-VPN7-Logging and Monitoring8-ACS (Access control server)9-ISE10-WSA11-ESA Security Terminology Accept Anything that is valuable to organization (that is to be protected) Can include Property, People, …
Cisco SDWAN: vEdge Router Factory Reset
Sometimes you are reusing the vEdge device which is in invalid state on vManage but you didn’t removed any configurations on the vedge. The best way to reuse that device to …
WhatsApp discloses critical vulnerability in older app versionsWhatsApp discloses critical vulnerability in older app versionsWhatsApp discloses critical vulnerability in older app versions
The bug, which has been patched in newer versions of the app, would let an attacker execute malicious code after sending a specially crafted video call WhatsApp has published details …
The Open System Interconnection (OSI) Model
Layer Example Application Layer Telnet, SSH, FTP, SMTP, HTTP, NFS, SNMP Presentation Layer JPG, PNG, GIF, MPEG, ASCII, CSS, HTML Session Layer RPC, SCP, TLS Transport Layer TCP, UDP Network …
Cisco SD-WAN
Cisco SD-WAN is a platform solution for resolving performance, scalability and management ofnetworks facing the transition into a cloud-based, mobile world. Cisco helps users remain visible acrossWAN while experiencing fast …