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Samenvatting - MCTS self-paced training kit (exam 70-642) : configuring Windows server 2008 network infrastructure
1 Understanding and Configuring TCP/IP
What are Network Layers
Functional steps in communication that are performed by programs called protocols.
In Computer Networking we use the OSI model, 7 layered model. OSI stands for Open Systems Interconnect.
TCP IP model has 4 layers, Application, Transport, Internet, Network Interface
OSI, application, Presentation, Seesion, transport, Network, Data Link, Physical
1.1 Introducing windows Networking
IPv4, or simply IP, is responsible for addressing and routing packets between hosts that might be dozens of network segments away. IPv4 relies on 32-bit addresses.
Ipv6 uses 128-bit addresses and as result it can define more addresses.
Is supported in Windows Vista and later OS's.
TCP/IP: Transmission Control Protocol/ Internet Protocol
UDP: User Datagram Protocol
TCP gebruikt men dus primair als de overdracht zeker en compleet moet zijn (o.a. bij bestandsoverdracht); UDP gebruikt men als de overdracht vooral snel moet zijn (telefoon, video).
At which networking layer is Ethernet found?
What do routers do to network broadcasts by default?
Routers block broadcasts by default.
Transmission Control Protocol/Internet Protocol ( TCP/IP ) defines a 4-layered architecture, including the Network Interface or Data Link Layer, The internet or network layer, transport layer and the application layer. Because of their position within the OSI model networking model these layers are also known and layer 2, 3, 4 and 7 respectively.
Network and Sharing Center is the main network configuration tool in Windows server 2008 and windows Server 2008 R2. You can use Network and Sharing center to perform functions such as setting the network location, viewing the network map, configuring network discovery, configuring the file and and printing sharing and viewing the status of network connections.
1.1.1 Configuring Networking Properties in Windows Server 2008 R2
Network Map relies on 2 components:
1) LLTD Mapper component queries the network for devices to include in the map
2) LLTD Responder component responds to the queries from the mapper I/O
How to make a computer running Windows XP appear on the network map?
Install LLTD Responder on that computer
LLTD stands for?
Link Layer Topology Discovery
which command do you use in cmd to change the adapter settings?
Are software components ( Client for Microsoft Networks ) that allows the local computer to connect with a particular network operating system.
This is the only network client to bound all LAN's. Also it allows windows client computers to share resources on other windows clients.
Are software components that provide additional features for network connections. File and Printer Sharing for Microsoft Networks and QoS Packet Scheduler are 2 network services bound to all LAN's by default.
4 Protocols by default: IPv4, IPv6, LLTD Mapper and LLTD Responder.
How to view an address configuration?
By default, all network connections are set to default to APIPA when no DHCP server can be reached.
The computer assign itself to a private IP address in the range of 169.254.0.1 through 169.254.255.254 with subnet 255.255.0.0
when 2 client computers can see each other but cannot connect to anything else on the network, suspect APIPA ( automatic Private IP Addressing )
There is a problem with the DHCP server or there is a faulty connection to the DHCP server.
How to renew IPv6 address?
How to test network connectivity?
ICMP, Firewalls and ping...
ICMP is blocked by default by windows Firewall and also by some routers and stand alone firewalls.
So to use ping, tracert and pathping, you need to Ensure that ICMP is not blocked.
To enable this go to Windows Firewall with Advanced security Console to enable File and Printer sharing firewall rule or use a GPO throughout the domain.
How to trace a path from the local computer to a remote computer?
tracert ( remote_host )
Similar to tracert is?
pathping, except that pathping is intended to find links that are causing intermittent data loss.
Arp is the name both a utility and a protocol.
ARP: Address Resolution Protocol.
Is a Duplicate MAC address listing in the ARP cache Always a sign of a problem?
Unless you have assigned 2 or more ipv4 addresses to a single network adapter somewhere on your local network, each IPv4 address in the ARP cache should be associated with a unique physical address.
IPv6 prevents arp cache poisoning:
To resolve IP-to MAC address mappings, IPv6 uses a protocol named Neighbor Discovery ( ND ) instead of the ARP protocol used by IPv4. For this reason, a nice benefit of an all IPv6 network is that it prevents the possibilty of ARP cache poisoning.
A user complains she cannot connect to any network resources. You discover her computer assigned itself with a APIPA address. What should you do first?
Open CMD and use command ipconfig /renew
Which address is suitable for servers?
Manual ( static ) address