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Cyb 210 Networking Exam Study Guide with Questions all 100% Solved Correct
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Cyb 210 Networking Exam StudyGuide with Questions all 100%
Solved Correct
Subnetwork (Subnet) - ✔✔A logical division of a local area network, which is created to improve
performance and provide security. To enhance performance, it limits the number of nodes that
compete for available bandwidth. Instead of one network handling all the traffic, the network is divided
into groups of clients and servers that interact with each other most of the time. For security, the
divisions can be based on servers that have restricted applications. Routers are bridges used to traverse
network segments. In an IP network, the subnet is identified by a subnet mask (PC Magazine, 2018).
Supernetting - ✔✔Combining several IP network addresses into one IP address. It reduces the
number of entries in a routing table and is done in CIDR addressing as well as in internal networks.
VLAN - ✔✔A logical subgroup within a local area network that is created via software rather than by
manually moving cables in the wiring closet. It combines user stations and network devices into a
single unit regardless of the physical LAN segment they are attached to and allows traffic to flow more
efficiently within populations of mutual interest.
Wide Area Network (WAN) - ✔✔A long-distance communications network that covers a wide
geographic area, such as a state or country. The telephone companies and cellular carriers deploy these
to service large regional areas or the entire nation. Large enterprises have their own private WANs to
link remote offices, or they use the internet for connectivity. Of course, the internet is the world's
largest WAN (PC Magazine, 2018).
Optical - ✔✔Communications between computers, telephones, and other electronic devices using
light. This type of network is far more reliable and has far greater potential transmission capacity
than networking in the electrical domain (PC Magazine, 2018).
, Wired - ✔✔Connected via cable (PC Magazine, 2018)
Wireless - ✔✔Transmission through the air. Although all forms of radio transmission over the air
(AM, FM, TV, cordless phones, cell phones, etc.) are naturally wireless, there is a tendency for the term
to refer only to Wi-Fi or to cellular data services (PC Magazine, 2018).
Border Gateway Protocol (BGP) - ✔✔The routing protocol that is used to span autonomous systems
on the internet. It is a robust, sophisticated, and scalable protocol that was developed by the Internet
Engineering Task Force (IETF). BGP4 supports the CIDR addressing scheme, which increased the
number of available IP addresses on the internet. A path vector protocol, it was designed to supersede
EGP, the original exterior gateway protocol (PC Magazine, 2018).
Classless Interdomain Routing (CIDR) - ✔✔An expansion of the IP addressing system that allows for a
more efficient and appropriate allocation of addresses. The original class-based method used fixed fields
for network IDs, which was wasteful. For example, Class A and B networks can address 16 million and 65
thousand hosts respectively, and most organizations given those addresses never had intentions of
putting that many computers on the internet (PC Magazine, 2018).
Domain Name System (DNS) - ✔✔The internet's system for converting alphabetic names into
numeric IP addresses. For example, when a web address (URL) is typed into a browser, these servers
return the IP address of the web server associated with that name. In this made-up example, it converts
the URL "www.company.com" into the IP address 204.0.8.51. Without this, you would have to type the
series of four numbers and dots into your browser to retrieve the website, which you actually can do
(PC Magazine, 2018).
Dynamic Host Configuration Protocol (DHCP) - ✔✔The automatic assigning of IP addresses to
client machines logging into an IP network. The same address, although technically temporary, may
remain with a machine indefinitely unless a conflict arises with other devices on the network.
Dynamic IP - ✔✔A temporary numeric identification assigned to a node in a TCP/IP network. When
computers and devices in the network are turned on for the first time, they are assigned an IP
address by a DHCP server (PC Magazine, 2018).
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