Q. You have an IP of 18.104.22.168 with a subnet mask of 7 bits. How many hosts and subnets are possible? A. 126 hosts and 510 subnets B. 128 subnets and 512 hosts C. 510 hosts and 128 subnets D. 512 subnets and 128 hosts Correct answer: C Explanation: Class B network has the form N.N.H.H, the default subnet mask is 16 bits long. There is additional 7 bits to the default subnet mask. The total number of bits in subnet are 16+7 = 23. This leaves us with 32-23 =9 bits for assigning to hosts. 7 bits of subnet mask corresponds to (2^7-2)=128-2 = 126 subnets. 9 bits belonging to host addresses correspond to (2^9-2)=512-2 = 510 hosts. But i what studied in Cbts Trainings the Formula to know the subnets is " 2 raise power n " Where n is the number of subnets bits, so the answer subnets should be 128. But in the explanation , it use formula to find the hosts ? Kindly reply ASAP
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Good Morning, Dear Cisco Experts, I need your guidence regarding two important matters, 1- My CCSP is going to be expired on 16 Feb 2010. I have attached my Cisco acheivement pdf file. Kindly suggest me , which exam i need to stop my CCSP expires before above mentioned date. 1.1- Now how many exams i need to achieve the CCNP Security title. What i understan from cisco site, if i give only two exams IPS v7 and VPN or SNAA then i will got CCNP Security Tital and my CCSP also renew for next three years. What you say ? 1.2- if i want to get CCNP Track then what are the exams for that one. Last but not least , what in which senario i will same time and money as well. My Detail Information is mention below. Kindly reply me as early as possible because i have left my less time to save my CCSP tile.
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