QoS Concept Overview Because we don’t have enough bandwidth to send all through at the same time a mechanism called FIFO (first-in first-out) gets triggered.The more realistic congestion point though is from your router to…
The idea of syslog is to summarize all the logs of all network devices and servers on one server, and you always have to consult this syslog server to see the logs. BSD -> older…
What is SNMP? SNMP -> simple network management protocol A bit like DHCP. DHCP says “give me that IP, and I’m good to go” SNMP says “give me that value, and I’m good to go”.…
NTP – Network Time Protocol Manually Setting Cisco Clocks Logs on cisco devices have a time stamp. If the time is not correct, the time log in the logs are wrong as well and you…
Cisco discovery protocol Using Cisco Discovery Protocol CDP allows you to see directly attached devices. But not just the devices, you see as well some information like which local port they are connected to, you…
With port security you can restrict, what device or how many devices can use this port. Port-Sec Max devices -> I want to limit how many devices (mac addresses are allowed to plug in to…
Network security Triangle of CIA, our mission of protecting our environment You can make a house so secure that no one can enter or leave it. But that destroys the whole meaning of a house.…
What is a reverse proxy? A reverse proxy is like a smart receptionist sitting in front of your internal servers and services. Instead of letting visitors (like your web browser) talk directly to each application…
So…Why Are Access Lists Important? An ACL is literally just a list of statements. There are two major types; standard and extended. Standard is just a list of source ip addresses with a permit or…
First of all, all IPv6 adresses is a biiiiig number!! (2128). An example of an IPv6 address is: 1051:2ABC:3500:0004:5ABC:7662:AB79:08A1 So the subnetmask always just represents the network bits in IPv6. So what’s a /64 network…