Transport Layer Security | Layer Marney | Simple Authentication and Security Layer | Ozone layer | Ozone Layer | MPEG-1 Audio Layer II | ATM Adaptation Layer 5 | Thin layer chromatography | Sattler's layer | Quartz (graphics layer) | Physics Abstraction Layer | ozone layer | Ontology Inference Layer | Layer Pyramid | Germ layer | Fighting Layer | abstraction layer |
Survivability can be addressed in many layers in a network and protection can be performed at the physical layer (SONET/SDH, Optical Transport Network), Layer 2 (Ethernet, MPLS) and Layer 3 (IP).
VSP 4850GTS, a 1RU Layer 2/Layer 3 Switch that is equipped with 48 10/100/1000 Ethernet ports (including two common ports offering SFP connectivity) plus 2 10 Gigabit Ethernet ports that feature SFP+ physical connectivity.
An individual certified in CCIE Storage will be highly skilled with LANs, MANs and WANs over Fibre Channel, iSCSI, FCIP and FICON, and must demonstrate in-depth understanding of layer 2 and layer 3 network infrastructures.
According to Cisco, Layer 3 switches are basically routers that switch based on Layer 3 information, the basic difference being processing speed and/or the way they do the switching; Layer 3 switches use ASICs/hardware instead of the CPU/software that a router would.