Read the text and choose the correct word for each number.
Date: 2015-10-07; view: 590.
VLANs
A) Tell some words about Cell-based VLANs and Frame-based VLANs. Describe three modes of VLAN configuration.
Read the text and put the verbs in brackets into the correct tense-aspect form. Be careful with the Passive Voice.
Make summary of parts 15, 16 and 17 of the text.
The acronym VLAN (to expand) to Virtual Local Area Network. A VLAN (to be) a logical local area network that (to extend) beyond a single traditional LAN to a group of LAN segments, given specific configurations. Because a VLAN (to be) a logical entity, its creation and configuration (to do) completely in software.
Since a VLAN is a software concept, identifiers and configurations for a VLAN must properly (to prepare) for it to function as expected. Frame coloring (to be) the process used to ensure that VLAN members or groups properly (to identify) and (to handle). With frame coloring, packets (to give) the proper VLAN ID at their origin so that they may properly (to process) as they (to pass) through the network. The VLAN ID then (to use) to enable switching and routing engines to make the appropriate decisions as defined in the VLAN configuration.
There (to be) only two types of VLAN possible today, cell-based VLANs and frame-based VLANs.
1. Cell-based VLANs (to use) in ATM switched networks with LAN Emulation (or LANE). LANE (to use) to allow hosts on legacy LAN segments to communicate using ATM networks without having to use special hardware or software modification.
2. Frame-based VLANs (to use) in Ethernet networks with frame tagging. The two primary types of frame tagging (to be) IEEE 802.10 and ISL (Inter Switch Link is a Cisco proprietary frame-tagging). Keep in mind that the 802.10 standard (to make) it possible to deploy VLANs with 802.3 (Ethernet), 802.5 (Token-Ring), and FDDI, but Ethernet (to be) most common.
There (to be) three different modes in which a VLAN can (to configure). These modes (to cover) below:
1. VLAN Switching Mode ─ The VLAN (to form) a switching bridge in which frames (to forward) unmodified.
2. VLAN Translation Mode ─ VLAN translation mode (to use) when the frame tagging method (to change) in the network path, or if the frame (to traverse) from a VLAN group to a legacy or native interface which (not to configure) in a VLAN. When the packet is to pass into a native interface, the VLAN tag (to remove) so that the packet can properly enter the native interface.
3. VLAN Routing Mode ─ When a packet (to route) from one VLAN to a different VLAN, you (to use) VLAN routing mode. The packet (to modify), usually by a router, which (to place) its own MAC address as the source, and then (to change) the VLAN ID of the packet.
(By Bradley Mitchell)