Chapter 5 Flashcards
Because these devices connect network entities, they’re known as. p117
connectivity devices
What are some of the common network connectivity devices.p117
Hub Network Interface Card (NIC) Bridge Basic switch Basic router Basic firewall Dynamic Host Configuration Protocol (DHCP) server Other specialized devices
what is a Hub. p118
Is the device that connects all the segments of the network together in a star topology Ethernet network.
is installed in your computer to connect, or interface, your computer to the network. It provides the physical, electrical, and electronic connections to the network media. p118
Network Interface Card (NIC)
what is a Bridge. p120
Is a network device that connects two similar network segments together. Its primary function is to keep traffic separated on either side of the bridge, breaking up collision domains
what is a Switch p120
Switches connect multiple segments of a network together much like hubs do, but with three significant differences—a switch recognizes frames and pays attention to the source and destination MAC address of the incoming frame as well as the port on which it was received.
is a network device used to connect many, sometimes disparate, network segments together, combining them into what we call an internetwork. p121
Router
what is a Firewall. p125
A firewall protects your LAN resources from invaders that prowl the Internet for unprotected networks, while simultaneously preventing all or some of your LAN’s computers from accessing certain services on the Internet.
what is (DHCP)p126
This protocol gives us a much easier way to administrate by automatically providing IP information
than the alternative and tedious method known as static IP addressing, where we have to address each host manually.
Other Specialized Devices are what.p129
Multilayer switch Load balancer DNS server Proxy server Content filter Encryption devices VPN concentrator
a computer networking device that switches on Open Systems Interconnection (OSI) Layer 2 like an ordinary network switch but provides extra functions on higher OSI layers, like Layer 3, for routing. p130
multilayer switch (MLS)
follow various rules to determine specifically how they will route network traffic. Depending on your needs, you can set rules based on the least load, fault tolerance, the fastest response times, or just dividing up (balancing) outbound requests for smooth network operations. p130
Load Balancer
what is a (DNS) Domain name service p130
One of the most important servers in your network and on the Internet as well. Why? Because without a DNS server, you would have to type http://206.123.114.186 instead of simply entering www.lammle.com.
basically a type of server that handles its client-machine requests by forwarding them on to other servers while allowing granular control over the traffic between the local LAN and the Internet. p135
Proxy Server
There are two main types of proxy servers you’ll typically find working in present-day networks: p135
Caching proxy server
Web proxy server
what are some of the things that commonly cause LAN traffic congestion: 138
Too many hosts in a broadcast domain Broadcast storms Multicasting Low bandwidth Adding hubs for connectivity to the network
__________ is the time measured from when a frame enters a port to the time it exits a port. p144
Latency
______ can run up to gigabit speeds with very low latency rates.p144
application-specific integrated circuit (ASIC)
If the destination is on a different segment, the frame can be transmitted only to that segment. This is called. p145
transparent bridging
The term________ was introduced before routers and hubs were implemented, so it’s pretty common to hear people referring to bridges as switches. p140
bridging
routers use a ________to make path selections and to forward packets to remote networks. p140
routing table
Unlike Layer 2 switches, which forward or filter frames, routers (Layer 3 switches) use logical addressing and provide what is called p140
packet switching
Routers can also provide packet filtering by using access lists; and when routers connect two or more networks together and use logical addressing (IP or IPv6), this is called an. p140
internetwork
There are two advantages of using routers in your network: p139
They don’t forward broadcasts by default.
They can filter the network based on Layer 3 (Network layer) information (such as IP address).
what is a VPN Concentrator
Is a device that accepts multiple VPN connections from remote location.
The process of finding the IP address for any given host name is known as what. p131
Name Resolution
(WINS) stands for what. p131
Windows Internet Naming Service
A host name is typically the name of a device that has a specific IP address on the Internet it is part of what is known as a what. p131
Fully qualified domain name (FQDN)
Other typical records found on DNS servers are _______ which are used to translate mail records. p133
mail exchanger records (MX)
