The 48-bit address used in Ethernet and wireless LAN to identify devices within the same network. The upper 24 bits identify the manufacturer, and it is assigned to each interface at manufacture.
Japanese name: MACアドレス
MAC address appears in 4 practice questions across 1 topic, including Computer Networking Basics.
Field: Computer Networking Basics
Answer: A. The default gateway, 192.168.1.1
The host first uses its own IP address and subnet mask to decide whether the destination is on the same network. 203.0.113.80 is outside 192.168.1.0/24, so the packet is handed to the default gateway (a router). The destination in the IP header stays the server's 203.0.113.80; only the frame's destination MAC address is set to the gateway's. So ARP looks up the MAC address of 192.168.1.1. ARP broadcasts do not cross routers, so the host cannot look up, and does not need, the MAC address of a server on another network. Each router along the path looks up the MAC address of the next device whenever it forwards.
The destination in the IP header stays the server's 203.0.113.80; only the frame's destination MAC address is set to the gateway's.
A host (192.168.1.10/24, default gateway 192.168.1.1) sends…A MAC address is the 48-bit address used in Ethernet and wireless LAN, written in hexadecimal such as 00:1A:2B:3C:4D:5E.
Which statement about MAC addresses is correct?An L2 switch is a layer 2 device: it records which source MAC address arrived on which port in a table (the MAC address table) and forwards each frame only to the port where its destination MAC address is connected.
Compared with a hub (repeater hub), which correctly describ…In ARP (Address Resolution Protocol), the host that wants to send broadcasts a request saying "whoever has this IP address, tell me your MAC address," and only the matching device replies with its MAC address by unicast.
Which correctly describes the role of ARP?As an Amazon Associate I earn from qualifying purchases.
ARP DHCP Default gateway Subnet mask DNS (Domain Name System) CIDR CSMA/CA NAT (Network Address Translation) OSI reference model Port number