Which one of the following characteris...

单项选择题Which one of the following characteristics is true regarding the use of hubs and switches?（）

A. Hubs can have their ports be configured with VLANs
B. Using hubs is costly with regard to bandwidth availability.
C. Switches can not forward broadcasts.
D. Switches are more efficient than hubs in processing frames.
E. Switches increase the number of collision domains in the network.

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1.单项选择题 You are an administrator of a switched network and your goal is to reduce some of the administrative overhead on your network. You plan on achieving this by configuring a new VLAN for each department in your network. However, you need to share the VLAN information across numerous switches throughout your network.
Which of the following would allow you accomplish this?（）

A.STP
B.GVRP
C.SNMP
D.VTP
E.DHCP

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2.多项选择题Which of the following answers are correct characteristics of microsegmentation, in the context of a Local Area Network (LAN)?（）

A. Dedicated paths between sending and receiving hosts are established.
B. Multiple subnetwork broadcast addresses are created.
C. Multiple ARP tables are needed.
D. The decrease in the number of collision domains.
E. Broadcast domains are enhanced.
F. Additional bandwidth is used to connect hosts.

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3.多项选择题What are some characteristics of the typical VLAN arrangement?（）

A. VLANs logically divide a switch into multiple, independent switches at Layer 2.
B. Trunk links can carry traffic for multiple VLANs.
C. VLAN implementation significantly increases traffic due to added trunking information.
D. A VLAN can span multiple switches.
E. VLANs extend the collision domain to include multiple switches.
F. VLANs typically decrease the number of multiple switches.

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4.单项选择题You want your Catalyst switch to implement a switching method that holds a packet in its memory until the data portion of the respected packet reaches the switch.Which method should you employ on your Catalyst switch?（）

A. Fast Forward
B. Store and forward
C. Frag-free
D. None of the above

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5.多项选择题What are two characteristics of "store and forward" switching?（）

A. Latency fluctuates regardless of frame size.
B. The switch receives the complete frame before beginning to forward it.
C. Latency through the switch varies with frame length.
D. The switch checks the destination address upon receipt of headers.

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6.单项选择题Catalyst switches utilize a special technology to identify and prevent topology loops and ensure that data flows properly through a single network path. What is the name of this technology?（）

A. VTP
B. ISL
C. 802.1Q
D. STP
E. None of the above

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7.多项选择题Which fields are included in the TCP header?（）

A. Source Port
B. Acknowledgement Number
C. Request Number
D. Destination Address
E. Window
F. Data

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8.单项选择题How many simultaneous Telnet sessions does a Cisco router support by default?（）

A.1
B.2
C.3
D.4
E.5
F.6

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9.单项选择题Which of the following protocols use both TCP and UDP ports?（）

A. FTP
B. SMTP
C. Telnet
D. DNS
E. All of the above

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10.多项选择题What statements are true regarding ICMP packets?（）

A. They acknowledge receipt of TCP segments.
B. They guarantee datagram delivery.
C. They can provide hosts with information about network problems.
D. They are encapsulated within IP datagrams.
E. They are encapsulated within UDP datagrams.

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