question #1 Sahih Muslim 291b, Book 2, Hadith 142 : What is the significance of the chain of transmitters in the authentication of hadiths?

This tradition is narrated by Abu Kuraib, Ibn Numair, Abu Tahir, Ibn Wahb, Yahya b. ‘Abdullah b. Salim, Malik b. Anas, ‘Amr b. Harith on the authority of Hisham b. ‘Urwa, with the same chain of transmitters like one transmitted by Yahya b. Sa’id like the above-mentioned.