What is scoping ?
Scoping is the restriction of multicast data transport to certain limited regions of the Internet. It comes in two flavors, TTL scoping and administrative scoping. • What is TTL scoping ? Every Internet Protocol Packet has a Time To Live (TTL) field, which despite the name is really a count of the number of hops (transmission from one router to the next) the packet is allowed. The TTL field is decremented by one each time a packet leaves a router, and a packet with a TTL of zero is discarded. Although the TTL field was implemented to prevent packets from looping forever in the network, the TTL field can be set low to prevent packets from leaving a particular domain. The problem with TTL scoping is that the hop-distance to the edge of a network or domain from a given source may not uniform, and so it may not be possible to both service the entire domain with multicast traffic and prevent that traffic from leaking to other domains, no matter what TTL value is chosen. • What is Administra
The catalog uses the concept of scoping, which allows you to specify a particular library before searching for items. When you are searching at computers within a library, in most cases the default location searched will reflect that library. To see materials at all Minuteman (MLN) libraries, change the location to “All Locations Collection”.
