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14 Cards in this Set
- Front
- Back
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What is a Subnet?
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A subnet mask allows you to identify which part of an IP address is reserved for the network, and which part is available for host use
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What is the difference between a private IP and a public IP Address
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Private IP is non-routable
Public IP is routable. |
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What is a A record
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The Address (A) record associates a domain name with an IP address, which is the primary purpose of the DNS system.
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What is a PTR record
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PTR records resolve IP addresses into hostnames
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What is a MX record
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An MX (mail exchange) record can be used to point your domain name email services to your own mail server
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What is a CNAME record
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Aliasing Names (CNAME)
The Canonical Name (CNAME) record is used to create aliases that point to other names. |
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What is a DNS Zone
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The DNS zone file is a specially formatted file containing information about a domain's resources such as mail servers and web servers. The primary purpose of a zone file is to provide the information necessary to convert an alphanumeric domain name into a numeric IP address.
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DNS port Number
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Port 53
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DHCP Process
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Client - DHCPDISCOVER
Server - DHCPOFFER Client - DHCPREQUEST Server - DHCPACK |
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HUB
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Hubs are repeater devices designed to replicate a signal on one port and replicating it on all other ports.
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SWITCH
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A network switch is a small hardware device that joins multiple computers together within one local area network (LAN). Technically, network switches operate at layer two (Data Link Layer) of the OSI model.
Unlike hubs, network switches are capable of inspecting data packets as they are received, determining the source and destination device of that packet, and forwarding it appropriately |
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OSI
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Application
Presentation Session Transport Network Data Link Physical |
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DHCP port
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Client UDP port 68.
The server replies on UDP 67 |
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Name Server (NS) record
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identifies the authoritative DNS servers for a domain
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