WIRELESS NETWORKS AND PERVASIVE COMPUTING

WIRELESSNETWORKS AND PERVASIVE COMPUTING

August27, 2014.

IPRouting simulation

CCNA.(2010). Free Router simulator software. Retrieved on August 27, 2014from http://www.9tut.com/free-router-simulators

Inthis tutorial a simulation is given on how to configure IP networkusing different interfaces. In particular, the tutorial explains howsimulators are used to re-create the programming language in real IProuting. Through network simulation routing tables and calculationsare done to assess the matching network entities and mathematicalformulas.

Newlanguage learned and technical terms

Networkinterface refersto the standardized protocols of functions involved in passingmessages, connecting or disconnecting networks. Network interfacehave network addresses that with an Id and a port number.

DuplicatePackets refersto the observed network behavior when a network packet is receivedtwice. It is a problem that occurs when the sending hosts think thatthe sent packet did not reach the receiving posts and hence thepackets are retransmitted leading to packet duplication (CCNA, 2010).

Linklayer Refersto a host’s subnet that is reachable through local network link.

Internetlayer Refersto a routing phenomenon in which specific router nodes forwardnetwork packets. In this case, there are no specific routers forparticular destination and default routers are used.

Areasof uncertainty left by the tutorial

Thetutorial lacks detailed simulation on how to an IP router isconfigured through various interfaces or IP addresses.

Evaluationof the tutorial

TheIP simulation tutorial is effective in its vivid description of howIP routing algorithm and routing types are used to select the nexthop router using a routing table. In addition, the tutorialeffectively explains how several destinations can be matched and theroute with the longest subnets chosen. Furthermore, the tutorialexplains two types of IP routing the link layer and the internetlayer types. However, the tutorial does not adequately give detailedsimulation on how IP router configuration could be achieved (CCNA,2010).

DNSsimulation

Whitepaper (2013).TrafficDuplication Solution BestPractices for Eliminating Duplicate Packets. Retrieved fromhttp://www.ixiacom.com/pdfs/network_visibility/library/white_papers/Anue_Duplicate_Packets_wp.pdf

Thetutorial presents an overview discussion on how two networks could beused to enhance traffic duplication solution. In addition, thetutorial explains how slower tools and the duplication of packetsminimizes the effectiveness of bandwidth capacity leading to packetloss (White paper, 2013). In this tutorial, a simulation is given onhow network packets are duplicated and how duplication could beprevented or reduced. In the simulation, the author describes howmonitoring tools and the SPAN are used to reduce packet duplicationto enhance network performance (Schffman,2012).

Newlanguage learned and technical terms

Packettracer itis the latest version of Cisco networking technology for teaching andlearning simulations.

Graphicalnetwork simulator (GNS3)is a network simulator that simulates how network packets are sharedin complex networks.

Areasof uncertainty left by the tutorial

Althoughthe tutorial has an extensive simulation of how traffic duplicationis reduced, the tutorial fails to address in details the aspects ofhub, the switches, packet sniffing and the Cisco SPAN. These aspectsare important in the understanding network traffic duplications andhow it is prevented.

Evaluationand experience of the tutorial

Thetutorial was insightful on the issue of network traffic duplication.In particular, the tutorial described the problems created by SPANsports and how such duplicating problems can be eliminated using thenetwork monitoring switch. Overall, the tutorial is helpful inunderstanding network duplication and duplication reduction practicessuch as using the network analyzer and the network monitoring switch(Schffman, 2012).

References

CCNA.(2010). Free Router simulator software. Retrieved on August 27, 2014from http://www.9tut.com/free-router-simulators.

SchffmanM. (2012). SPAN packet duplication: Problem and Solution. Retrievedon August 27, 2014 from

http://blogs.cisco.com/security/span-packet-duplication-problem-and-solution.

Whitepaper (2013).TrafficDuplication Solution BestPractices for Eliminating Duplicate Packets. Retrieved fromhttp://www.ixiacom.com/pdfs/network_visibility/library/white_papers/Anue_Duplicate_Packets_wp.pdf