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5.3. Which of the following statements are correct for the VLAN ? 下列哪些對於虛擬區域網路的敘述是正確的 ? |
| (a) A VLAN is a logical group of stations within a bridged LAN (BLAN). 虛擬區域網路是在橋接網路(BLAN)上的邏輯主機群組 | |
| (b) The members of a VLAN can be added, removed, or changed dynamically. 虛擬區域網路的成員可以被動態的加入、移除、或修改 | |
| (c) The VLAN function is supported over shared and point-to-point media. 虛擬區域網路支援共享式傳輸媒體以及點對點式傳輸鏈路 | |
| (d) Each VLAN has a unique identification (VID). 每個虛擬區域網路有一個唯一的辨識碼 (VID) | |
| (e) All the bridges/switches must be VLAN aware devices. 所有的交換機/橋接器必須為”虛擬區域網路設備” |
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5.4. We said that traffic between VLANs is firewalled. This means that 我們說虛擬區域網路間的流量是被防火牆防護的,這代表? |
| (a) The stations belong to different VLANs can not transmit packets to each other directly. 屬於不同虛擬區域網路的主機不能直接相互傳送訊框 | |
| (b) The traffic between VLANs must be forwarded by a router. 不同虛擬區域網路間的流量必須經由路由器轉送 | |
| (c) A physical firewall is built between VLANs. 虛擬區域網路之間有架設一個實體防火牆設備 | |
| (d) Only the broadcast traffic between VLANs are limited. Unicast traffic can still be exchanged directly between VLANs. 虛擬區域網路之間只有廣播流量受到限制,單播訊框還是可以在不同的虛擬區域網路之間直接交換 | |
| (e) Only the broadcast and multicast traffic between VLANs are limited. 虛擬區域網路之間只有廣播與群播的訊框受到限制 |
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5. Without VLAN configuration setting, what happens when a station sends a broadcast or multicast frame in a bridged LAN (BLAN) ? 在沒有採用虛擬區域網路的環境下,當一台主機在橋接網路上傳送一個廣播或群播訊框時,會發生什麼事? |
| (a) The frame will be forwarded by the routers connected to the bridged LAN. 此訊框將會由連接在橋接網路上的路由器來傳送 | |
| (b) The frame will be filtered by the routers connected to the bridged LAN. 此訊框將會被連接在橋接網路上的路由器過濾 | |
| (c) A broadcast frame will be forwarded to all the stations in the bridged LAN. 廣播訊框將會被傳送到橋接網路上所有的主機 | |
| (d) A multicast frame will only be forwarded to all the members of the multicast group. 群播訊框將會被傳送到該群播群組中的所有成員 | |
| (e) A multicast frame will be forwarded to all the stations in the bridged LAN. 群播訊框將會被傳送到橋接網路上所有的主機 |
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5.6. What happens when a member of a VLAN x sends a broadcast frame ? 當虛擬區域網路 x 的成員發出一個廣播訊框時,將會發生何事? |
| (a) The frame will be forwarded to all the stations in the bridged LAN. 此訊框將會被傳送到橋接網路上所有主機 | |
| (b) The frame will be forwarded to all the stations in the VLAN x. 此訊框將會被傳送到虛擬區域網路 x上所有主機 | |
| (c) The frame will be forwarded by the routers connected to the bridged LAN. 此訊框將會被連接在橋接網路上的路由器傳送出去 | |
| (d) The frame will be filtered by the routers connected to the bridged LAN. 此訊框將會被連接在橋接網路上的路由器過濾掉 | |
| (e) The frame will be forwarded to all the stations in the VLAN x and VLAN y, where VLAN y and VLAN x are in the same switch. 此訊框將會被傳送到虛擬區域網路 x和虛擬區域網路 y上所有主機, 只要虛擬區域網路 x與虛擬區域網路 y都在同一個交換機上 |