What is a Network? Collection of nodes and links that connect them This is vague. Why? Consider different networks > Internet 》 Andrew 》 telephone ) Your house >)Others-sensor nets, cell phones, Focus on Internet, but understand important common issues and challenges
11 What Is a Network? Collection of nodes and links that connect them This is vague. Why? Consider different networks: » Internet » Andrew » Telephone » Your house » Others – sensor nets, cell phones, … Focus on Internet, but understand important common issues and challenges
Networks Juggle Many Goals Efficiency -resource use; cost The: 》 Evolvability 》 Manageability >) Security (securability, if you must) 》 Ease of: Creation Deployment Creating useful applications 》 Scalability 12
12 Networks Juggle Many Goals Efficiency – resource use; cost The: » Evolvability » Managability » Security (securability, if you must) » Ease of: – Creation – Deployment – Creating useful applications » Scalability