Cisco CCNA 200-301 – The Security Threat Landscape Part 3

5. Firewalls vs Packet Filters You’ll learn how firewalls work and I’ll also compare them with packet filters. But your access control lists. So firewalls secure traffic passing through them by either permitting or denying it according to their rules stateful firewalls maintain a connection table which tracks the two way state of traffic passing… Read More »

Cisco CCNA 200-301 – The Security Threat Landscape Part 2

3. Common Attacks You’ll learn about the common attacks that hackers use in their attempts to compromise your systems. You learned in the last lecture that if it is a targeted attack, then the hacker will typically start off with doing reconnaissance of your organization. So we’ll start there reconnaissance, obtains information about the intended… Read More »

Cisco CCNA 200-301 – The Security Threat Landscape

1. Introduction In this section, you’ll learn about the It security threat landscape. I’ll start off by giving you the definitions that apply to general security. And then I’ll talk about the methodology that hackers follow when they are attacking you. I’ll tell you about the different devices that are available to provide protection, such… Read More »

Cisco CCNA 200-301 – QoS Quality of Service Part 4

5. Policing and Shaping In this lecture you’ll learn about traffic shaping and policing. When people talk about QoS in general, they’re probably talking about queuing, but there are other QoS mechanisms available like shaping and policing which are also commonly used. Traffic shaping and policing can be used to control traffic rate. Both measure… Read More »

Cisco CCNA 200-301 – QoS Quality of Service Part 3

4. Congestion Management In this lecture, you’ll learn about congestion management and how to configure queuing on your Cisco devices. When we talk about congestion management, we are talking about queuing. So there’s some congestion on the router or the switch, there’s more traffic coming in, then it’s able to send out. So it has… Read More »

Cisco CCNA 200-301 – QoS Quality of Service Part 2

3. Classification and Marking You’ll learn about classification and marking, which is part of your QoS configuration for a router or switch to give a particular level of service to a type of traffic, obviously it has to recognize that traffic first. Common ways to recognize the traffic are by Cost, which is class of… Read More »

Cisco CCNA 200-301 – QoS Quality of Service

1. Introduction The next three sections are for technologies that are new on the CCNA exam. That’s QLS quality of service, which we’re going to cover in this section, and then cloud computing, and finally, Sdn software defined networks. So for these three new sections, Cisco don’t expect you to know how to configure them.… Read More »

Cisco CCNA 200-301 – Network Device Management Part 4

8. SNMPv3 Lab Demo So I’ve got my lab topology open here. You can see it’s really simple. I’ve got my router R One, which has got the SNMP agent running on there. It’s got IP address 100 One which is facing towards the SNMP manager, which is my NMS server. My SNMP manager has… Read More »

Cisco CCNA 200-301 – Network Device Management Part 3

6. SNMP Lab Demo In this lecture, you’ll see how to configure SNMP on a Cisco device using a lab demo. I’ve got the same topology again. I’ve got my router R One at 100 one, and the SNMP server is my NMS system at 100 100, which is the PC that I’m working on… Read More »

Cisco CCNA 200-301 – Network Device Management Part 2

3. Terminal Monitor and Logging Synchronous In this lecture you’ll learn about how to configure syslog through a lab demo. The lab topology is really simple. I’ve just got my router R one with IP address, ten dot O dot O dot one. And I’ve got my syslog server at ten dot O dot O… Read More »