The network layer then uses its protocol (IP) and translates that www.yahoo.com into an IP address. The network layer is also in charge for determining the best route through the network in order to get to the IP address destination. The data link layer is, unlike the other two which are virtual, a physical address with is permanently encoded to a device through its network card. The data link layer is a unique identifier to each computer in a network. Thus a MAC address is the only address that will always remain the same, transport and data layer address can change depending on the network.
Server computers and other systems that need to be accessed reliably by network clients should be configured with a static IP address. The method of breaking up IP address space into address ranges of flexible size is called Classless Inter-domain Routing. Multiple Choice What must each host on a TCP/IP network be configured with in order to communicate with other hosts? C) IP Addressing What is the process of transmitting TCP/IP traffic from one IP sub-net to another? B) Routing An IP network that is formatted such as 192.168.1.0/25 is referred to as what type of notation?
4. LAN-to-WAN • LAN-to-WAN Domain is where the IT Infrastructure links to a Wide Area Network (WAN) and the Internet. Responsible for applying the defined security controls to prevent unauthorized network access 5. WAN • Wide Area Network (WAN) Domain connects remote locations. Manages client’s firewalls and router configurations .The goal is to allow users the most access possible by making sure the data traveling in and out is safe 6.
Add the user to /etc/samba/smbusers and assign a password using smbpasswd. 3. # smbpasswd –a [name] 4. The [homes] share implicitly shares the home directory of each user without having to define specific shares. It should not be browse able because being browse able exposes usernames making it easier for a malicious user to break into the system.
If you connect to your internal network, what should you check if you cannot connect to web servers on the internet? C. Proxy settings 3. What technology automatically configures IRQs, DMA channels, I/O port addresses, and memory addresses ranges for an expansion card? D. Plug and Play 4. Which built-in account gives full access to the computer system?
What is a ping sweep and how does it work? A ping sweep is a, “diagnostic technique used in computing to see what range of IP addresses are in use by live hosts, which are usually computers.” (What is a Ping Sweep?, 2013). Using just the ping command in a command prompt, you can verify whether a host is alive or not if it returns the ping. In a ping sweep, this is done on a larger scale to see which IPs are active on a network. Doing this, the attacker will know which computers are alive and which aren’t so they know where they should concentrate their attacks on.
IP addresses 192.168.103.1 will be used for the internal interface address of the SonicWall and 192.168.103.2 will be used for the customer web server. The remaining 252 IP addresses will be available for local and remote employee devices. The SonicWall-Ne WAPs will be used at this location as well. Because of the static VPN connection between New York and Austin, these WAPs will be centrally managed by the SonicWall in the Austin office. Employees that travel between locations will easily be able to connect their devices.
Furthermore, in order to maintain complete access to all computers on the network, if you make changes to a user account, you must update each computer in the workgroup with the changed information. If you forget to add a new user account on one of the computers in a workgroup, the new user will not be able to log on to that computer or access its shared resources over the network. One key advantage to using Windows XP workgroups to share resources is that it does not require a computer running
Skype allows it’s member to not only video chat but also instant message. Calls can also be made to telephone numbers and there is a conference call feature (Wikipedia.com). FaceTime and Skype’s code source cannot be changed. These products are only to be used for what they were created to do. If there are changes to the product, only the manufacture will release the updates for the consumers to upload to the software.