Antisolar point Antisolar point The antisolar point is the abstract point on the celestial sphere directly opposite of the Sun from an observer's perspective. This means that the antisolar point lies above the horizon when the Sun is below it, and vice versa. On a sunny day, the antisolar point can be easily found; it is located within the shadow of the observer's head. Like the zenith and nadir, the antisolar point is not fixed in three-dimensional space, but is defined relative to the observer. Each observer has their own antisolar point, which moves along with them as they change position. The
Point-to-Point Protocol over Ethernet 4-byte Ethernet MAC FCS, which reduces the figure of 18 bytes above to 14, and (ii) by using the RFC 2684 VC-MUX option, which reduces the 10 byte LLC overhead down to 2 bytes. It turns out that this can be a very valuable efficiency improvement. Using VC-MUX instead of LLC, the ATM payload overhead would be either 32 bytes (without Ethernet FCS) or 36 bytes (with FCS). ATM AAL5 requires that an 8-byte long ‘CPCS’ trailer must always be present at the very end of the final cell (‘right justified’) of the run of ATM cells that make up