chẳng hạn như một subnet hợp lý hoặc phân khúc. VLAN có thể mở rộng các cổng switch, thiết bị chuyển mạch trong một khối chuyển đổi, hoặc tủ đựng quần áo và các tòa nhà. VLAN nhóm người dùng và các thiết bị vào các nhóm làm việc chung trên địa bàn. | 534 Appendix A Answers to Chapter Do I Know This Already Quizzes and Q A Sections Chapter 6 Do I Know This Already 1. c 2. b 3. b 4. b 5. b 6. c 7. d 8. c 9. b 10. a 11. c 12. a Q A 1. What is a VLAN When is it used A VLAN is a group of devices on the same broadcast domain such as a logical subnet or segment. VLANs can span switch ports switches within a switch block or closets and buildings. VLANs group users and devices into common workgroups across geographical areas. VLANs help provide segmentation security and problem isolation. 2. When a VLAN is configured on a Catalyst switch port in how much of the campus network will the VLAN number be unique and significant The VLAN number will be significant in the local switch. If trunking is enabled the VLAN number will be significant across the entire trunking domain. In other words the VLAN will be transported to every switch that has a trunk link supporting that VLAN. 3. Name two types of VLANs in terms of spanning areas of the campus network. Local VLAN End-to-end VLAN Chapter 6 535 4. What switch commands configure Fast Ethernet port 4 11 for VLAN 2 interface fastethernet 4 11 switchport mode access switchport access vlan 2 5. Generally speaking what must be configured both switch and end user device for a port-based VLAN The switch port 6. What is the default VLAN on all ports of a Catalyst switch VLAN 1 7. What is a trunk link A trunk link is a connection between two switches that transports traffic from multiple VLANs. Each frame is identified with its source VLAN during its trip across the trunk link. 8. What methods of Ethernet VLAN frame identification can be used on a Catalyst switch trunk ISL 9. What is the difference between the two trunking methods How many bytes are added to trunked frames for VLAN identification in each method ISL uses encapsulation and adds a 26-byte header and a 4-byte trailer. adds a 4-byte tag field within existing frames without encapsulation. 10. What is the purpose
