question #1 Sahih Muslim 307b, Book 3, Hadith 28 : What is the significance of the chain of transmitters in the authentication of hadiths?

This hadith has been transmitted with the same chain of transmitters from Mu’awyia b. Salih by Zuhair b. Harb, ‘Abd al-Rahman b. Mahdi, Harun b. Sa’id al-‘Aili and Ibn Wahb.