Network and Security

This is most basic and simple lab for preparing ICND1 exam, which will test your skills related to different password configurations and RIPv2 on Cisco router. You need to complete the configuration on newly installed router “ Florida ” in below network-diagram, RIPv2 is running on other router so you need to complete following configuration for making communication possible among Florida and newyork router: Set the name of router to Florida Set the enable-secret password of Florida to icnd1 Set the global configuration password to icndpass Configure vty password (telnet) to ICND1VTY Assign the first useable IP address to Ethernet interface Fa0/0 from subnet 192.168.1.0/27   Assign the last IP address to serial interface S0/0 from subnet 200.1.1.128/28   Advertise above two subnets via RIPv2 routing protocol on Florida. Solution : If you want to practice this lab in GNS3 then you can download router (newyork) configurations  from here and can complete the rema

How to Configure RIP on Juniper in GNS3 1.1 In this article i will show you how to run the RIP ( Routing Information Protocol ) among juniper routers. when you configure the RIP on junos by default it will enable RIP v2 & this is one of the difference from Cisco where you need to configure version2 manually. I have simulated this lab on gns3 which is one famous network simulator. For juniper simulation i have used junos olive  only for study purpose  and  junos olive  is not suitable for any type of commercial use.  Gns3 Labs detail are as mention below but you can use  any versions of these software. Gns3 version= Gns3 1.1 Junos version=    JunOS Olive 12.1 VM image VM VirtualBox version=    4.2.4  If you want learn more about the configuration of junos in gns3 you can visit how to configure junos on gns3 . Lab Requirements: There are three Junos routers in given topology which are connected with each other and already configured with correct IP address

Wide Area Networks Wide Area Networks can be seen as connection pipes that interconnect Local Area Networks. Usually WANs in contrast to LANs are not owned by the public; they are owned by service providers and their functionality-infrastructure is leased in order for LANs to be able to extend their expandability and make use of distant-remote services. A number of different WAN connection types exist today. Choosing the right WAN connection type is up to you, but the information in this article will make your decision process much easier. WAN Connection Types Leased Line: This is considered to be a dedicated point-to-point connection type where a permanent communication path exists between a Customer Premise Equipment (CPE) on one site and a CPE at the remote site communicating through a Data Communicating Equipment (DCE) within the providers’ site. Synchronous serial lines are used for this connection and the most frequent protocols observed in these lines are HD

Benefits of VLSM VLSM provides the ability to subnet an already subnetted network address. The benefits that arise from this behavior include: Efficient use of IP addresses: IP addresses are allocated according to the host space requirement of each subnet. IP addresses are not wasted; for example, a Class C network of 192.168.10.0 and a mask of 255.255.255.224 (/27) allows you to have eight subnets, each with 32 IP addresses (30 of which could be assigned to devices). What if we had a few WAN links in our network (WAN links need only one IP address on each side, hence a total of two IP addresses per WAN link are needed). Without VLSM that would be impossible. With VLSM we can subnet one of the subnets, 192.168.10.32, into smaller subnets with a mask of 255.255.255.252 (/30). This way we end up with eight subnets with only two available hosts each that we could use on the WAN links. The /30 subnets created are: 192.168.10.32/30, 192.168.10.36/30, 192.168.10.40/30,

Let’s start with simple explanation of the new format. As you may know, the new-generation-IP talk started in the early 1990s when we were slowly running out of IP addresses. We had quite a few proposals for the new address format but in 1995 IPv6 was selected and the RFCs were officially entered into the RFC repository. IPv6 was created based off of IPv4 with some of the useful IPv4 features carried over to IPv6. There were many changes to the new IP format, however, and I will list some of them here below. Expanded Addressing Capabilities : IPv6 address size increased from 32 bits to 128 bits. Because of the increased size the new address will support a higher number of nodes, more levels of addressing hierarchy, and a much simpler autoconfiguration of addresses for remote users. A new address type was created, called anycast . Header Format Simplification : To simplify the entire IP format, some of the IPv4 header fields were dropped or made optional in IPv6. Fl

The Transmission Control Protocol/Internet Protocol (TCP/IP) suite was created by the U.S. Department of Defense (DoD) to ensure that communications could survive any conditions and that data integrity wouldn’t be compromised under malicious attacks. The Open Systems Interconnection Basic Reference Model (OSI Model) is an abstract description for network protocol design, developed as an effort to standardize networking. In this article, I will present the differences between the DoD and the OSI models and then provide details about the DoD’s version of TCP/IP. I will also describe the protocols used at the various layers of the DoD model and provide you with the details of TCP and UDP protocols. Throughout this article you will find useful information concerning the protocol suite of the century: TCP/IP. So if you’re preparing for your CCENT or CCNA exams, or if you’re just interested in networking, this is one article you don’t want to miss! Fasten your s