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27 Cards in this Set
- Front
- Back
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packet switched networks |
data is broken up into packets each labeled with the destination address |
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data packets 3 components |
header, data area, trailer |
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TCP/IP |
transmission control protocol/ internet protocol: most common protocol used on lan/wan environments; protocol of the internet |
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Layer 5 |
application layer: the reason why you are doing something |
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Types of applications found on layer 5 |
email: smtp, pop 3, imap web browsing: http secure web browsing: https transferring files: ftp network monitoring: snmp web services:SOAP peer to peer: bit torrent |
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Layer 3: Network Layer |
establishes the route: router and IP address is found on this layer |
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layer 2: Data link layer |
where the switches are found; transfers data between computers on wan or lan networks
mac address (media access control) |
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Layer 1: physical layer |
cables/wires/ fiber optics; the physical device used to travel |
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NMS |
network management system: management software used to manage a network, diagnose problems, gather stats
nmsgui= graphically see whats going on in a network |
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Examples of NMS's |
IBM's net view HP's open view Tivoli Nagios |
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SNMP |
simply network management protocol: used to figure out what is going on inside the LAN
reported activity sent from network device to console to oversee the network |
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LAN |
local area network; computer network covering a small area
based on ethernet or wifi equipment: switches and routers |
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Ethernet |
ieee, 802.3 based on lan and is found on layer 2 |
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Switches |
computer network device that connects other network elements
sends data based on the mac address |
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Routers |
network device that forwards packets from one network to the other; found on layer 3
reads the packets and decides how to forward it |
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Router manufactures |
Cisco, Juniper, F5, Baracuda
home gateways linksys, netgear, 2 wire, dlink |
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WAN |
communications that occur across a wide geographical area |
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WAN Technologies |
fiber optics sonet point to point MPLS ( multiple protocol label switching)
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MPLS |
mutiple protocol label switching: givers priority to certain types of data
ex. audio/video: netflix |
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SSL |
secure socket layer: leading security protocol of the internet; creates an encrypted connection |
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PGP |
pretty good protocol: utilizes a combo of public and private key cryptography, hashing, compression, and signing to secure info |
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Key terms |
encryption key PKI digital certificates |
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encryption |
conversion of data into secret code for transmission over a public network |
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keys |
binary number combines a key with the data transmitted |
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digital certificates |
like the id of a website, helps to verify the website
ex:RSA, Verisign, Thwate |
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PKI |
public key infrastructure: framework used for digital certificates |
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Firewall |
security device used to block out hackers and certain kinds of data |
