How do NAT and DHCP conserve IP addresses?
How do NAT and DHCP conserve IP addresses?
NAT and PAT. The concept of NAT is based on the fact that every computer sending traffic outside its LAN to the Internet must be assigned a routable IP address. To conserve IP addresses, LAN users make use of a range of private IP addresses for routing local traffic.
This module describes how to configure Network Address Translation (NAT) for IP address conservation and how to configure inside and outside source addresses. This module also provides information about the benefits of configuring NAT for IP address conservation.
NAT enables private IP internetworks that use nonregistered IP addresses to connect to the Internet. NAT operates on a device, usually connecting two networks. Before packets are forwarded onto another network, NAT translates the private (not globally unique) addresses in the internal network into legal addresses. NAT can be configured to advertise to the outside world only one address for the entire network. This ability provides more security by effectively hiding the entire internal network behind that one address.
NAT is also used at the enterprise edge to allow internal users access to the Internet. It allows Internet access to internal devices such as mail servers.
DHCP is an abbreviation for Dynamic Host Configuration Protocol. It is an application layer protocol used by hosts for obtaining network setup information. The DHCP is controlled by DHCP server that dynamically distributes network configuration parameters such as IP addresses, subnet mask and gateway address.
A DHCP server provides a client with ________. A. one or more IP addresses for it to use B. the IP address of one or more DNS servers C. both one or more IP addresses for it to use and the IP address of one or more DNS servers D. neither one or more IP addresses for it to use nor the IP address of one or more DNS servers
1. In regards to NAT, How are private IP address ranges used? 2. Is NAT transparent to the operating systems of the two hosts involved? 3. To all applications?
DHCP (Dynamic Host Configuration Protocol) is used for automatic configuration of a network interface. Such a configuration includes several parts. Consider the case when a computer is connected to an IP subnet where there is a DHCP server. Which of the following configuration items are provided through DHCP? The name of the outgoing mail server. The IP address to the router which connects the subnet to the rest of the Internet. Information about what addresses that are included in the...
Which TCP/IP Application layer protocol provides IP address resolution for domain names? A. DHCP B. DNS C. SMTP D. SNMP
The following questions relate to IP addresses. Question 4 The following questions relate to IP addresses Question 4 Part (a) Homework Unanswered Match the IP addresses on the left with their class on the right. Premise ResponseDrag and drop to match 159.255.16.0 A Class D 2 9.10.11.12/22 → -B Class C 3 228.199.209.254 → C Class A 4 15.208.256.20 D CIDR -E Invalid F Class E G Class B Submit Question 4 Part (b) Homework Unanswered What is the broadcast...
a. How many possible IP addresses are there in IPv4? (Ignore any reserved or special addresses and give the total possible number.) Does IPv6 give more, less, or the same number of addresses? Briefly explain. b. Consider the network of LANs in the diagram below. Dark squares are routers, and light squares are hosts. Give the IP routing tables at both routers, including netmasks and gateways. c. Give, and explain, the path through the network for a packet originating at...
While investigating the settings on your SOHO router, you find two IP addresses reported on the device's routing table, which is used to determine where to send incoming data. The two IP addresses are 192.168.2.1 and 71.9.200.235. Which of these IP addresses would you see listed as the default gateway on the devices in your local network? How do you know? Please keep answer 1-2 sentences.
6. Review: IP Addresses and Masks In this problem we are going to review IP addresses and bit masks. An IP address has 32 bits (4 bytes) and is written in dotted decimal form. This means that there are 4 decimal numbers, each of which is followed by a decimal point, such as 172.39.168.1 A mask can also be written in dotted decimal form. This problem will show you how to perform bitwise AND of an IP address and a...
Consider the scenario below in which three hosts, with private IP addresses 10.0.1.13, 10.0.1.15, 10.0.1.20 are in a local network behind a NATted router that sits between these three hosts and the larger Internet. NAT Translation Table WAN side addr LAN side addr 35.122.196.219:517 10.0.1.27:3435 10.0.1.13 2 S: D, 10.0.1.27 135.122.196.219 10.0.1.15 4 3 10.0.1.20 IP datagrams being sent from, or destined to, these three hosts must pass through this NAT router. The router's interface on the LAN side has...
1. Assume that host A sends an IP datagram to host F in Figure. From the operation of the ARP protocol, determine the source and destination MAC addresses and the source and destination IP addresses of the transmitted frame (i) from A to R0, (ii) from R0 to R1, (iii) from R1 to F.