$7.(10$ points$)$ Protocol Perils a$)(5$ points$)$ Prex hijacking, a misbehavior in which a miscongured or malicious BGP router originates a route to an IP prex it does not own, is becoming an increasingly serious security problem in the Internet. Propose an incrementally deployable solution, i$.$e$.,$ one that does not require changes to every router to address the problem. b$)(5$ points$)$ According to the research company Renesys, in February $2013,$ Internet trafc was silently redirected through an Internet service provider called GlobalOneBel, based in the Belarusian Capital, Minsk. The targets of these attacks included nancial institutions, government agencies and network service providers. What is this type of attack called? Explain the mechanism by which routers can mount such an attack.