[单项选择]

One of the most widely used routing protocols in IP networks is the Routing Information Protocol(RIP)．RIP is the canonical example of a routing protocol built on the (71) algorithm．Routing protocols in internetworks differ slightly from the idealized graph model．In aninternetwork，the goal of the routers to forward packets to various (72) ．
Routers running RIP send their advertisement about cost every (73) seconds．A router also sends an update message whenever an update from another router causes it to change itsrouting table．
It is possible to use a range of different metrics or costs for the links in a routing protocol．RIP takes the simplest approach，with all link costs being equal (74) Thus it always tries tofind the minimum hop route．Valid distances are 1 through (75) ．This also limits RIP torunning on fairly small networks．

（72）处应填（）。
A. computers
B. routers
C. switches
D. networks

[单项选择]

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the(71) algorithm. Routing protocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal of the routers to forward packets to various((72). Routers running RIP send their advertisement about cost every(73) seconds. A router also sends an update message whenever an update from another router causes it to change its routing table. It is possible to use a range of different metrics or costs for the links in a routing protocol. RIP takes the simplest approach, with all link costs being equal (74). Thus it always tries to find the minimum hop route. Valid distances are 1 through(75) ,This also limits RIP to running on fairly small networks.

空白处（71）应选择（）
A. distancevector 
B. linkstate 
C. flooding 
D. minimumspanningtree

[单项选择]English is the most widely-used language in the history of our planet. One in every seven human beings can speak it. More than half of the world’ s books and three-quarters of international mail are in English. Of all languages, English has the largest vocabulary—perhaps as many as two million words—and one of the noblest bodies of literature.
Nevertheless, let’s face it: English is a crazy language. There is no egg in eggplant, neither pine nor apple in pineapple and no ham in a hamburger. Sweetmeats are candy, while sweetbreads, which aren’t sweet, are meat.
We take English for granted. But when we explore its paradoxes, we find that quicksand can work slowly, boxing rings are square, public bathrooms have no baths in them.
And why is it that a writer writes, but fingers don’t fang, grocers don’t groce, and hammers don’t ham If the plural of tooth is teeth, shouldn’t the plural of booth be beeth One goose, two geese—so one moose, two meese
If the teacher taught, w
A. A wise man and a wise guy.
B. A slim chance and a fat chance.
C. Overlook and oversee.
D. Sweetmeat and sweets.

[填空题]It became by far the most widely used code because it was the easiest to understand and ______.(传输也最快)

[单项选择]The most widely used LAN system is ______ which adopts a form of access known as CSMA-CD．
A. Ethemet
B. ATM
C. FDDI
D. Wireless