Nt1330 Unit 1 Exercise 1

-DHCP means Dynamic Host Configuration Protocol and is a part of application layer. A DHCP server has a number of IP address in its memory to assign for the computers/hosts on a network.

-In a classic client connection to a Ethernet port, when the client tries to connect through DHCP exchange by broadcasting DHCP discovery frame to search a DHCP server. If the DHCP server is not present on the local subnet, a DHCP discovery must be forwarded by the router. And this is done by configuring an IP Helper Address on the router, to relay certain broadcast UDP frames (like DHCP) to a specific IP destination. In case of DHCP - the router will forward the DHCP discovery and request as unicast frames to one or more pre-configured DHCP servers.

-Interestingly, the original client doesn’t
These days it done in two ways. The most common method is to statically map an SSID with a VLAN. Once the client associates to the SSID, it is automatically placed in that SSID’s VLAN. The other way is to implement 802.1X user-based policies in which the client is assigned to a VLAN dynamically based on RADIUS attributes sent during 802.1X authentication. Regardless of the method, after the authentication is complete, the infrastructure (WLAN controller and/or AP) can map the client with a VLAN and IP