使用运营商MAC（Provider MAC）加上B-TAG进行业务的转发，从而使电信级以太网得到运营商的控制而隔离用户网络；
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
Unfortunately, hardly more than a week after the Fed halted the program, giant mortgage provider Freddie Mac reports that 30-year home mortgage rates have jumped to 5.21%, up from 5.08% the previous week, and 4.71% in December.
FORBES: Mortgage Rates Jump After Fed Removes Support.
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