ccna 200 301 syllabus of upsc epfo notification

ccna 200 301 syllabus of upsc epfo notification.In a system with classes, a router determines a class of addresses and identifies networks and hosts based on that class. In CIDR, however, the router uses a prefix to describe how many bits are network bits (or prefixes) and the remaining bits are host bits. The number indicating the prefix follows the end of the address with a slash ("/"), for example 192.168.1.0/30,where "/30" is the prefix. The network and host portions of an address are no longer limited by the full 8-bit group, e.g., 8 bits for a Class A address, 16 bits for a Class B address, and 24 bits for a Class C address.CIDR significantly improves the scalability and efficiency of IPv4 by using route aggregation (also known as supernetting), which effectively reduces the size of routing tables, saves router memory space, and improves router lookup efficiency. Example 3 in Section 255 of Chapter 2 is a specific application of CIDR. Here is another example. Nanjing University of Technology is connected to the China Education and Research Network, and because of the large number of Internet users, it applies for 16 Class C IP addresses, from 202.119.240.0 to 202.119.255.255, if CIDR is not used, the backbone router of the education network needs to have 16 static routes pointing to Nanjing University of Technology. If CIDR is not used, the backbone router of the education network needs to have 16 static routes pointing to Nanjing University of Technology. After using CIDR, the 16 consecutive Class C addresses are aggregated using the aggregation method in Chapter 2, Section 2.5.5, and the backbone router of the education network only needs to configure the route 202.119.240.0/20 to point to Nanjing University of Technology, which greatly reduces the size of the routing table.2. Cautions on Using CIDR Although using CIDR has many advantages, like using VLSM, it also depends on what kind of network protocols are used, RIPvl and IGRPStatic routes, RIPv2, EIGRP, OSPF, IS-IS, and BGP are all classless routing protocols that support CIDR. the next section will demonstrate in conjunction with the configuration that RIPvl does not support C1DR, and RIPv2 can support CIDR.<>6.4 RIPv2***This section discusses the limitations of RIPvl, and the enhanced features that RlPv2 has.177 A6.4.1 Limitations of RIPvl . **As you have learned from the previous introduction, RIPvl is a distance vector pathLoO:192.168.1.1/25 LoO:192.168.1.129/25 by choice protocol, using hop count as a unique metric, with 15 being the maximum number of hops, and in