Category Archives: ccent-ccna-lessons

IP Services

Overview In the previous chapter, we learnt how NAT is important in helping devices in a network access the internet, we also looked at DHCP and how it helps in automatic ip configuration on hosts as well as the use of ACLs in filtering traffic in our networks. In this chapter, we will look at […]

NAT (Network Address Translation)

Overview In the previous chapter, we saw how DHCP is useful in assigning ip addresses to hosts in a network. In this chapter, we will look at another important ip service that helps hosts access the internet. We will learn about, NAT operation and IPv4, and configure and troubleshoot NAT. NAT in today’s networks In […]

ACLs – Part II

Overview In part one of this chapter, we looked at the ACL concepts, we discussed how they worked and we topped it off with configuration of standard ACLs. In part 2, we will discuss extended ACLs and other ACL concepts, we will then configure extended ACLs and finish off with troubleshooting ACLs. Extended ACLs With […]

ACLs (Access Control Lists) Part I

Overview In the last chapter, we discussed network security and saw its importance in our networks. In this chapter, we will delve into the world of ACLs, in part 1, we will look at the ACL concepts as well as configuring standard ACLs. In part 2 of this chapter, we will continue with configuration but […]

Network Security

Overview In the last chapter, we looked at frame relay and discussed its importance in the WAN. In this chapter, we will look at some network security concepts that are vital in today’s world. We will look at some of the risks as well as the ways we can secure our devices, we will also […]

Frame Relay – Part II

Overview In part one of this chapter, we looked at the concepts behind frame relay operation. We discussed the role of the PVC’s, DLCI mapping, inverse ARP among other topics. In part two of this chapter, we will discuss more advanced frame relay concepts and finally look at the commands used to troubleshoot frame relay. […]

Frame Relay Part I

Overview In the previous chapter, we looked at PPP, we discussed how PPP worked and we said that it works at the data link layer, in this chapter, we will look at the final WAN topic in this course which is frame relay. In part 1, we will discuss the concepts behind frame relay operation […]

PPP (Point-to-Point Protocol)

Introduction In the previous chapter, we discussed serial connections in the WAN, we also discussed the default data link encapsulation on CISCO switches which is HDLC. In this chapter, we will look at PPP, we will discuss some of its concepts, learn how to configure PPP as well as its authentication options and finally we […]