What Am I Riddles

Question: Four hang, four sprang, two point the way, two to ward off dogs, one dangles after, always rather dirty.

What am I?

Question: What is white outside and yellow inside?

Question: I cannot speak but i tell everything.Im not a tree but i have a leaves. I have hinges but neither not a door nor a window. Who am i?

Question: I am both black and white. I go with the flow and my loyalty never wavers.

Question: I can be shared by many or spread to few, I am as fragile as silk yet as strong as steel. Wars have been fought in my name, generations defined by me. What am I?