Hard moveable 1 CM lymph node what is it?

Monitoring Centers. Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.
Only a biopsy. Would tell whether it's benign or malignant. Let's hope and pray that it's the former.Take care! http://www.M.Webmd.Com/a-to-z-guides/tc/swollen-lymph-nodes-topic-overview.