▁majority ▁of ▁devices ▁that ▁moved ▁IP ▁traffic ▁and ▁other ▁data ▁streams ▁were ▁hard - w ired ▁devices . ▁Since ▁then , ▁wireless ▁and ▁mobile ▁traffic ▁have ▁increased ▁and ▁are ▁predicted ▁to ▁continue ▁to ▁increase ▁rapidly . ▁C is co ▁predict s ▁that ▁by ▁the ▁year ▁ 2 0 2 1 , ▁w ired ▁devices ▁will ▁account ▁for ▁ 3 7 % ▁of ▁total ▁traffic ▁while ▁the ▁remaining ▁ 6 3 % ▁will ▁be ▁account ed ▁for ▁through ▁wireless ▁and ▁mobile ▁devices . ▁Furthermore , ▁smart phone ▁traffic ▁is ▁expected ▁to ▁sur pass ▁PC ▁traffic ▁by ▁ 2 0 2 1 ; ▁PC s ▁are ▁predicted ▁to ▁account ▁for ▁ 2 5 % ▁of ▁total ▁traffic , ▁down ▁from ▁ 4 6 % ▁in ▁ 2 0 1 6 , ▁whereas ▁smart phone ▁traffic ▁is ▁expected ▁to ▁increase ▁from ▁ 1 3 % ▁to ▁ 3 3 %. ▁ ▁According ▁to ▁the ▁Organisation ▁for ▁Econom ic ▁Co - operation ▁and ▁Development ▁( O E CD ), ▁mobile ▁broad band ▁pen etr ation ▁rates ▁are ▁ever - g row ing . ▁Between ▁June ▁ 2 0 1 6 ▁and ▁December ▁ 2 0 1 6 ▁there ▁was ▁an ▁average ▁mobile ▁broad band ▁pen etr ation ▁rate ▁increase ▁of ▁ 4 . 4 3 % ▁of ▁all ▁O E CD ▁countries . ▁Poland ▁had ▁the ▁largest ▁increase ▁coming ▁in ▁at ▁ 2 1 . 5 5 % ▁while ▁Lat via ▁had ▁the ▁lowest ▁pen etr ation ▁rate ▁having ▁decl ined ▁ 5 . 7 1 %.