Table of Contents
- 1 How does a switch learn a MAC address of an attached host?
- 2 Which protocol is used to find the MAC address of a host on the local network?
- 3 How does a switch learn MAC addresses explain the process?
- 4 What is duplicate MAC address?
- 5 Which protocol is used to acquire the MAC address of a host whose IP address is known?
- 6 Why is a MAC address needed?
- 7 Does host a and host B have the same IP address?
- 8 Can the host PC1 communicate with other hosts on remote networks?
How does a switch learn a MAC address of an attached host?
A switch can learn MAC address in two ways; statically or dynamically. In the static option, we have to add the MAC addresses in the CAM table manually. In the dynamic option, the switch learns and adds the MAC addresses in the CAM table automatically. The switch stores the CAM table in the RAM.
Can two hosts have same MAC address?
4 Answers. It’s possible for two hosts to have the same MAC, due to spoofing, a mistake during manufacturing, or willful negligence on the part of the manufacturer. So, 1) In general, an Ethernet switch keeps a table of which MAC addresses are attached to which ports.
Which protocol is used to find the MAC address of a host on the local network?
Address Resolution Protocol (ARP)
Address Resolution Protocol (ARP) is a procedure for mapping a dynamic IP address to a permanent physical machine address in a local area network (LAN). The physical machine address is also known as a media access control (MAC) address.
How is a MAC address assigned to a host?
A MAC address is given to a network adapter when it is manufactured. It is hardwired or hard-coded onto your computer’s network interface card (NIC) and is unique to it. Something called the ARP (Address Resolution Protocol) translates an IP address into a MAC address.
How does a switch learn MAC addresses explain the process?
A switch builds its MAC address table by recording the MAC address of each device connected to each of its ports. The switch uses the information in the MAC address table to send frames destined for a specific device out the port, which has been assigned to that device.
What do switches use to learn where hosts are?
A Layer 2 switch learns most of its information about the location of other endpoints via “listening” to ingressing frames, and when it is not aware of the location, it uses flooding and will learn from the answer.
What is duplicate MAC address?
A duplicated MAC address means you have multiple devices responding to data requests as if they are the only device with that address on the network, or you have a switch that keeps changing the port assignment for that address because the switch keeps seeing the device’s MAC address moving from port to port.
Which protocol is used for MAC address?
ARP
ARP is the protocol used to associate the IP address to a MAC address. When a host wants to send a packet to another host, say IP address 10.5. 5.1, on its local area network (LAN), it first sends out (broadcasts) an ARP packet.
Which protocol is used to acquire the MAC address of a host whose IP address is known?
Address Resolution Protocol (ARP) is a protocol or procedure that connects an ever-changing Internet Protocol (IP) address to a fixed physical machine address, also known as a media access control (MAC) address, in a local-area network (LAN).
How many hosts does a Class B address support?
Table 2-1 IP Addresses Available to Internet Hosts
| Address Class | First Octet Range | Number of Hosts Per Network |
|---|---|---|
| Class A | 0 to 126 | 16,777,214 |
| Class B | 128 to 191 | 65,534 |
| Class C | 192 to 223 | 254 |
Why is a MAC address needed?
The MAC address is an important element of computer networking. MAC addresses uniquely identify a computer on the LAN. MAC is an essential component required for network protocols like TCP/IP to function. Computer operating systems and broadband routers support viewing and sometimes changing MAC addresses.
How to find the MAC address of the host B?
In order to find out the MAC address of host B, host A sends an ARP request, listing the host B’s IP address as the destination IP address and the MAC address of FF:FF:FF:FF:FF:FF (Ethernet broadcast). Switch will forward the frame out all interfaces (except the incoming interface).
Does host a and host B have the same IP address?
Since there are no Routers in this illustration, we know all the communication is happening within the same network — therefore, Host A and Host B are both configured with IP addresses that belong to the same network. Each host has a unique IP address and MAC address.
What is the source and destination of the L2 header?
The Source of the L2 header will be Host A’s MAC address (aaaa.aaaa.aaaa). The Destination of the L2 header should be Host B’s MAC address, but at the moment, Host A doesn’t have an entry in its ARP Table for Host B’s IP address, and therefore, does not know Host B’s MAC address.
Can the host PC1 communicate with other hosts on remote networks?
The host PC1 can communicated with other host on the local network, but is unable to communicate with hosts on remote networks such as the Web server. which of the following is a benefit of using a layered model for network communications?