Category: Networks


45 Useful USSD Codes MTN, Vodacom, Telkom, Cell-C

A USSD codes allow users to access various services, such as menu-type applications using short codes usually start with * and end with # and can be typed into any cell phone to call up a specific action Vodacom USSD Code Description *136# Airtime balance *135# Master USSD menu *135# Check WASP subscriptions *#06# View Read More

Cisco CCNA exam Cram Sheet

Cisco CCNA exam Cram Sheet General Networking Port Numbers Port Number Layer 4 Protocol Suite Application 20 TCP FTP Data 21 TCP FTP Program 23 TCP Telnet 25 TCP SMTP 53 TCP/UDP DNS 69 UDP TFTP 80 TCP HTTP Ping Responses ! – Reply from target address . – Timeout U – Destination unreachable C Read More

Cisco ACL Revision

Access Control Lists (ACL) Access Control Lists are used to: Prioritise traffic Restrict or reduce updates Provide basic security Block types of traffic Access control list placement Standard ACLs – Place as close to destination as possible. Extended ACLs – Place as close to source of traffic as possible. Only one ACL per port per Read More

Top 10 Show Commands for Cisco Routers

The Absolute top 10 show Commands Everybody Needs To Know in Cisco Routers Some commands in the Cisco router configuration are just irreplaceable. The ‘show’ commands are the most widely used in Cisco routers. Here is a list of the 10 mostly used of these ‘show’ commands. 1. show running-config This command is your true Read More

EIGRP tunnel template Cisco

Cisco tunnel template – EIGRP Below is a tunnel template used to provide a single site failover between two remote locations. interface Tunnel[SITE TUNNEL KEY] description —- [SITE] & [REMOTE SITE] —- ip address [SITE TUNNEL IP] ip flow ingress tunnel source [LOCAL PROVIDER INTERFACE IP] tunnel destination [SITE PROVIDER IP] tunnel key [TUNNEL KEY] Read More

Understanding the Cisco IOS File Name Convention

Cisco IOS naming conventions can seem a bit confusing, however to avoid bricking a device its important that you have a full understanding of the Cisco IOS naming conventions. Before planning an upgrade or install of an IOS file, it is very important that you check the name of each IOS file. The IOS file name Read More

ip tcp adjust-mss causing browsing problems

Cisco Router causing browsing problems after installing a cisco router I saw that users were not able to browse the internet, strangely enough they could open the home page or the landing page of a website but could browse no further, as in click a link on the site or view the next page. after a Read More

CCNA basic switch configuration commands

Cisco basic configuration commands (CCNA) Command descriptions switch>? The ? works here the same as in a router Used to get the list of all available commands switch>enable User mode, same as a router switch# Privileged mode switch#disable Leaves privileged mode switch>exit Leaves user mode switch#show version Displays information about software and hardware. switch#show flash: Displays Read More