2. 计算机
  3. The number of home users and small businesses that want to use the Internet is everincreasing．The shortage of addresses is becom

The number of home users and small businesses that want to use the Internet is everincreasing．The shortage of addresses is becom

admin2020-04-30  63
问题 The number of home users and small businesses that want to use the Internet is everincreasing．The shortage of addresses is becoming a serious problem．A quick solution to thisproblem is called network address translation(NAT)．NAT enables a user to have a large set ofaddresses  (71)  and one address，or a smallset of addresses，extemally．The traffic insidecan use the large set；the traffic  (72)  ，the small set．To separate the addresses used inside thehome or business and the ones used for the Internet．the Internet authorities have reservedthree sets of addresses as  (73)  addresses．Any organization can use an address out of thisset without permission from the Internet authorities．Everyone knOWS that these reservedaddresses are for private networks．They are  (74)  inside the organization，but they are notunique globally．No router will  (75)  a packet that has one of these addresses as thedestination address．The site must have only one single connection to the global Internetthrough a router that runs the NAT software．
选项 A、local
B、outside
C、middle
D、around
答案B
解析
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