1) Yes you need.
VLAN need for systematization of work of the network and specific departments. You can of course still access the server to break but it is better to do more physically. At work I got rid of heaps of unmanaged switches and configured VLANы on a couple of switches, it is possible to normalize the network, and remove a bunch of probable and improbable interference and glitches.
2) there's No need.
If you have half the server VLAN do not need. The distribution between the Gateway - Server Gateway - user in this case is simple and requires no additional equipment. Equipment Hello microtitration
You can choose any of the available equipments not to dwell on the stamp. Mikrotik in the first place is a flexible OS designed for the work on the network equipment, but do not forget that HP and (I never thought I'd say this) the last D-link, offer enough stability and speed. Look at Juniper, Huawei you will be pleasantly surprised.
In order to understand whether you need VLAN or not take a pen and draw your network with all accesses. Maybe it really is easier to decide on AD/LDAP ? But get rid of unwanted traffic with unmanaged switches.
Clement_Johnst answered on July 2nd 19 at 17:02
It is up to You.
In General, these should need for safety.
Mikrotik - any. But in General, equipment which will provide Vilani, many, including significantly cheaper. I do not deny that Mikrotik good equipment and is extremely flexible in capabilities
sister58 answered on July 2nd 19 at 17:04
vlan is a tool for a specific task and not a silver bullet. Can 2 computers be required vlan, and maybe in a thousand not be required
To start, challenge yourself by answering the questions:
Whether you need to drive large amounts of data between departments? Do you use p2p protocols?
Whether used in a network broadcast? If so, which computers must obey him?
Jensen.Rosenbaum answered on July 2nd 19 at 17:06
Up to a maximum of 100 hosts normally feel in one vlan. If issues of safety do not require the vlan in your case it is possible not to fence, but to remove the hubs and replace with switches.
About Mikrotik - you can use any switch Mikrotik of 14 ports) not so much in a series of CRS...
earl.Weissnat answered on July 2nd 19 at 17:08
Whether vlan's on 40 computers?
Who knows what you need?
Desired or not, and why you need them only you know.
hailee_Parker26 answered on July 2nd 19 at 17:10
VLANs that segment the network. If you have a need to segment the network, then do, if not, then not.
VLAN departments in General, I think the strange thing is, why do they really need the mystery.
Can not really imagine a network in which 40 computers and if the need a 14 port router.
Or do l3 at the access layer, then you need Mikrotik directly to the "40" ports( 10 for 4, or two for 24 this is up to you ). Or do l2 access, then why Mikrotik 14 ports?
Howard.Gottli answered on July 2nd 19 at 17:12
There is a grid in the office on 40 computers, all built on hubs, does it make sense to fence vlanы by departments (11 departments) or not?
there is no meaning. but if you really want something can.
in the center of the network (the core language does not turn to call it) I can recommend HP 1920-24G(JG924A)