\nonstopmode
\documentclass[12pt]{article}
\usepackage{xcolor}
\usepackage{colortbl}
\usepackage{pgf}
\usepackage{amsmath,amssymb}
\usepackage{tikz}
\usetikzlibrary {arrows}
\usetikzlibrary {shapes}
\usetikzlibrary {snakes}
\begin {document} 
 \begin {tikzpicture} 

	 \clip (0.0, 0) rectangle (11.5,7);
	\draw[help lines] (0,0) grid (10,6); 
	 
	\draw (0, 6.6) node [right] {Global Unicast Address:};
	
	\draw (0,5) node [right, draw, shade, top color = yellow, minimum width=1cm, minimum height=1cm] {\tt{001}};
	\draw (1,5) node [right, draw, shade, top color = green, minimum width=3cm, minimum height=1cm] {Global Prefix};
%	\draw (4,5) node [right, draw, shade, top color = blue, minimum width=1.5cm, minimum height=1cm] {SID};
%	\draw (5.5,5) node [right, draw, shade, top color = black!50, minimum width=4.8cm, minimum height=1cm] {Interface ID};
	
%	\draw (0.5, 5.7) node {\tiny{3}};
%	\draw (2.5, 5.7) node {\tiny{45}};
%	\draw (4.7, 5.7) node {\tiny{16}};
%	\draw (8, 5.7) node {\tiny{64}};
	
	
%	\draw [snake=brace, mirror snake] (0, 4.20) -- (4, 4.20) node [below, midway] {\tiny{public topology}} node [below = 8pt, midway] {\tiny{given by the provider}} ;
%	\draw [snake=brace, mirror snake] (4, 4.20) -- (5.5, 4.20) node [below, midway] {\tiny{local topology}} node [below = 8pt, midway] {\tiny{assigned by network engineer}} ;
%	\draw [snake=brace, mirror snake] (5.5, 4.20) -- (10.3, 4.20) node [below, midway] {\tiny{link address}} node [below = 8pt, midway] {\tiny{auto or manual configuration}} ;
\end {tikzpicture} 
 \end {document}