Packet-based switching devices
VPI/VCI-based switching devices
Non-Packet-based devices
None of the above
A and B
第1题：
Flow control is a function that prevents network congestion by ensuring that _（ ）_ do not overwhelm_（ ）_ with data．There are three commonly used methods for handling network congestion．_（ ）_is used by network devices to temporarily store bursts of excess data in memory until they can be processed．_（ ）_ are used by receiving devices to help prevent their buffers from overflowing．_（ ）_ is a flow－control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted．
A.transmitting devices
B.transmitted devices
C.receiving devices
D.received devices@@@SXB@@@A.transmitting devices
B.transmitted devices
C.receiving devices
D.received devices@@@SXB@@@A.Buffer
B.Source－quench messages
C.window
D.Windowing
E.Buffering@@@SXB@@@A.Buffer
B.Source－quench messages
C.window
D.Windowing
E.Buffering@@@SXB@@@A.Buffer
B.Source－quench messages
C.window
D.Windowing
E.Buffering
第2题：
A.Routing loops, hold down timers
B.Switching loops, split horizon
C.Routing loops, split horizon
D.Switching loops, VTP
E.Routing loops, STP
F.Switching loops, STP
第3题：
● Lessons learned are most often based upon project historical records. Lessons learned can be used to:
A See what mistakes others have made
B See how others have solved problems
C Predict trends, highlight problems and identify alternatives
D All of the above
E A and B only
第4题：
GMPLS is based upon：（）
第5题：
Which option correctly identifies the Cisco IOS switching methods in descending order from the fastest method to the slowest method？（）
第6题：
Even though current technologies make the ultimate segmented network impractical, new technologies and products hold the promise of making the concept a reality. Most important of all these new technologies are (66) . The ultimate switched LAN, which is technically possible, now, exhibits the following characteristics:
1. High-speed yet cost-effective switching devices can be implemented on a wide scale, providing dedicated connections for individual users and supporting the aggregate (67) of all networked users.
2. The ability to deploy switching capabilities incrementally into the (68) base. Switching implementations support switching of individual users or groups so that existing users of shared media modules can continue to use the existing equipment until they can justify moving to dedicate switched LAN connections.
3. Support and enhancement of existing routed environments. Switching (69) routint, but rather can be introduced into the network without making any changes to the existing routing equipment or configuration.(70) play a critical role in the integration of switching into existing networks.
A．switch-based LANs
B．WANs
C．user services
D．LAN-BY-PHONE
第7题：
第8题：
文中（ 1 ）处正确的答案是（ ）。
A．transmitting devices
B．transmitted devices
C．receiving devices
D．received devices
第9题：
A distribution area provides an aggregation point for which components?（）
第10题：
Company uses layer 3 switches in the Core of their network. Which method of Layer 3 switching uses a forwarding information base （FIB）？（）