业务开通中通常说的设备端口包括（）

A:上行口GE或10GE端口 B:用于专线业务的下行ETH口 C:用户路由器的ETH端口 D:下行PON口、E1口、ADSL/VDSL、POTS

端口范围为0~1023的端口是（）。

A:静态端口 B:熟知端口 C:动态端口

常见的ONU上，有些端口标注POTS，这些端口的作用是（）。

A:连接PC B:连接笔记本 C:连接交换机 D:连接电话

LAN端口利用率=LAN端口实占容量÷（）LAN端口容量×100%。

A:LAN端口空闲容量 B:LAN端口容量 C:ONU端口容量

端口范围为0～1023的端口是（）

A:静态端口 B:熟知端口 C:动态端口

信息机的端口费有（）。

A:市级端口费用； B:省级端口费用； C:梦网端口费用； D:全网端口费用。

From: Paula Washington ＜pwashington@4seasonsgreenhouse.com＞
To: Clara Nash ＜order@coloniapottery.com＞
Subject: Order
Dear Mr. Nash,
My name is Paula Washington and I’m the owner of the Four Seasons Creenhouse in Lewiston. I was given your email address by Mr. Steve Halloway at the New England Florists’ Convention in Boston last fall. I would like to purchase a large number of clay pots from you. Our previous supplier recently went out of business and we urgently need to replenish our stock.
At this time, I would like to order four dozen of your plain six-inch clay pots, for dozen of your plain ten-inch clay pots, and two dozen of your large ornamental pots. I only want to make a small order at this time in order to test the quality of your merchandise. If this selection of products from your inventory meets our standards, a second, large order will follow.
Please arrange to have the clay pots delivered to our warehouse as quickly as possible. Because these items are fragile, please forward them by special delivery to ensure that they are not damaged. Also, let me know the name of the carrier you use, so I can access their online freight tracking system while these goods are in transit.
Thank you very much. Please call me at 729-9928 if you have any questions. I hope this is the start of a mutually beneficial business relationship.
Paula Washington
Four Seasons Greenhouse
Addressee: Remit to:
Four Seasons Greenhouse Colonial Pottery Distribution Center
161 North Highway 201 Atlantic: Drive
Lewiston, ME 04240 Salem, MA 01970
Statement:
Date Description Amounts
5/11/06 six-inch clay pots, plain (4 dozen) $36.00
Ten-inch clay pots, plain (4 dozen) $48.00
Sixteen-inch clay pots, ornamental (2 dozen) $240.00
Shipping and handling (see below for details) $59.99
Discount (see below for details) $32.40
Amount due: $351.59
Message:
This shipment was sent by special delivery at the buyer’s request. Please return any damaged items, along with the original receipt, within seven working days.
A ten-percent discount applies to all first-time orders placed by retailers. This discount does not apply to shipping and handling charges.

A:The six-inch clay pots B:The ten-inch clay pots C:The sixteen-inch clay pots D:The delivery charges

SMTP的端口号为______。

A:TCP的21端 B:TCP的25端口 C:UDP的161端口 D:UDP的162端口

SMTP的端口号为______。

A:TCP的21端 B:TCP的25端口 C:UDP的161端口 D:UDP的162端口