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Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

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Chapter 10

A1: An Intermediate System is the ISO term for a router.
A2: A Network Protocol Data Unit is the ISO term for a packet.
A3: An L1 router has no direct connections to another area. An L2 router only routes inter-area traffic. An L1/L2 router routes both inter-area and intra-area traffic and acts as an inter-area gateway for L1 routers.
A4: The borders of IS-IS areas are between routers, on links. The borders of OSPF areas are defined by the routers themselves.
A5: The Network Entity Title is an address by which a router identifies both itself and the area in which it resides.
A6: The NSAP Selector should be set to 0x00 in a NET.
A7: The System ID uniquely identifies a router within an IS-IS domain.
A8: The portion of the NET preceding the ...

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