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CCNP Routing Study Guide- P18:T his book is intended to help you continue on your exciting new path toward obtaining your CCNP and CCIE certification. Before reading this book, it is important to have at least read the Sybex CCNA: Cisco Certified Network Associate Study Guide, Second Edition. You can take the CCNP tests in any order, but you should have passed the CCNA exam before pursuing your CCNP. | Glossary 479 LNNI LAN Emulation Network-to-Network Interface In the Phase 2 LANE specification an interface that supports communication between the server components within one ELAN. load balancing The sharing of paths to a remote network. local explorer packet In a Token Ring SRB network a packet generated by an end system to find a host linked to the local ring. If no local host can be found the end system will produce one of two solutions a spanning explorer packet or an all-routes explorer packet. local loop Connection from a demarcation point to the closest switching office. local services Users trying to get to network services that are located on the same subnet or network are defined as local services. Users do not cross Layer 3 devices and the network services are in the same broadcast domain as the users. This type of traffic never crosses the backbone. LocalTalk Utilizing CSMA CD in addition to supporting data transmission at speeds of 230.4Kbps LocalTalk is Apple Computer s proprietary baseband protocol operating at the Data Link and Physical layers of the OSI Reference Model. local VLANs Local VLANs are configured by geographic location these locations can be a building or just a closet in a building depending on switch size. Geographically configured VLANs are designed around the fact that the business or corporation is using centralized resources like a server farm. loop avoidance If multiple connections between switches are created for redundancy network loops can occur. STP is used to stop network loops and allow redundancy. LSA link-state advertisement Contained inside of link-state packets LSPs these advertisements are usually multicast packets containing information about neighbors and path costs that are employed by link-state protocols. Receiving routers use LSAs to maintain their link-state databases and ultimately routing tables. Copyright 2001 SYBEX Inc. Alameda CA www.sybex.com 480 Glossary LSA acknowledgement A Link State Advertisement .
