I've been wondering what line card is?
Is it like NIC on interface?
Thank you. I'm learning CCNP. Hope I can move on my learning with the help of this community.
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It's often used as a reference to a chassis switch's multiple port module cards. Number of ports vary, but unlike module cards, line cards usually contain a good number, for instance 24 to 96 Ethernet copper ports. There's not a clear demarcation between a port module card and a port line card, but again, line cards are generally larger. Also, the term is informal.
An example of a "line card" (although not its official name), might be seen in figure 1 (and others), in http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-....