[单项选择]

Typically, these are concern with the establishment of （） the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of （） interface between user(application)program, normally referred to, as application processes or APs, and the underlying communication services may be （） For example, one computer may be a small single -user computer, while another may be a large （） system. In the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s Systems Network.
Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples o
A. DNA
B. SNA
C. the OSI
D. the ISO

[单项选择]

Typically, these are concern with the establishment of （） the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of （） interface between user(application)program, normally referred to, as application processes or APs, and the underlying communication services may be （） For example, one computer may be a small single -user computer, while another may be a large （） system. In the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s Systems Network.
Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples o
A. communication channel access
B. protocols
C. data channel
D. public communication

[填空题]What does the lecture mainly concern

[填空题]What does business concern usually do

[填空题]What does the talk mainly concern

[单项选择]
Inventory typically represents the second largest component of logistics cost to transportation. The risks associated with (21) inventory increase as products move down the supply chain closer to the customer because the potential of having the product in the wrong place or form increases and costs have been (22) to distribute the product. In addition to the risk of lost sales due to (23) because adequate inventory is not available, other risks include obsolescence, pilferage, and damage. Further, the cost of carrying inventory is significantly influenced by the cost of the capital (24) up in the inventory. Geographic specialization, decoupling, supply/demand balancing, and buffering uncertainty provide the basic rationale for maintaining inventory. While there is (25) interest in reducing overall supply chain inventory, inventory does add value and can result in lower overall supp