單項(xiàng)選擇題What is a global command?（）

A. A command that is available in every release of IOS, regardless of the version or deployment status.
B. A command that can be entered in any configuration mode.
C. A command that is universal in application and supports all protocols.
D. A command that is implemented in all foreign and domestic IOS version.
E. A command that is set once and affects the entire router.


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1.單項(xiàng)選擇題What feature of a networks switch allows an administrative to create separate broadcast domains?（）

A. Store-and-forward switching
B. Microsegmentation
C. Transparent bridging
D. Fragment-free switching
E. Virtual LANs
F. Cut-through switching

2.單項(xiàng)選擇題Which of the following options lists the steps in PPP session establishment in the correct order?（）

A. Optional authentication phase, link establishment phase, network layer protocol phase.
B. Network layer protocol phase, link establishment phase, optional authentication phase.
C. Network layer protocol phase, optional authentication phase, link establishment phase.
D. Link establishment phase, network layer protocol phase, optional authentication phase.
E. Link establishment phase, optional authentication phase, network layer protocol phase.
F. Optional authentication phase, network layer protocol phase, link establishment phase.

4.多項(xiàng)選擇題Which characteristics are representative of a link-state routing protocol?（）

A. Provide common view of entire topology
B. Exchange routing tables with neighbors.
C. Calculates shortest path.
D. Utilizes event triggered updates.
E. Utilizes frequent periodic updates.

5.多項(xiàng)選擇題Which of the following contribute to congestion on an Ethernet network?（）

A. Use of full duplex mode.
B. Creation of new collision domain.
C. Creation of new broadcast domain.
D. Addition of hub to the network.
E. Use of switches in the network.
F. Amount of ARP or IPX SAP traffic.