Name (print) ______________________________ Sec. ________ECE3076, Fall 2009Email ____________________HW-6Due Friday, Nov. 20 (beginning of class) Email to your TA. These topics may be on the Exam.1. When you type "www.cnn.com" into your browser, what are the two hosts whose Ethernet addresses must be obtained if nothing is cached from previous operations? a. ______gateway router__________ b. _____________local DNS server_____________b. On an IP network, what protocol is used to obtain these MAC addresses? _____ARP________2.Ethernet is called CSMA/CD, while WiFi is called CSMA/CA. MA stands for Multiple Access.a. What does CA mean ? ____collision avoidance__________________________b. What does it prevent? _____lost frames due to a collision________________________________c. What does CD mean ? _____collision detection______________________d. What does it prevent? _____lost time due continued sending after the collision starts__________3.Hosts A , B, C, and D are connected directly to an Ethernet SwitchX, whose forwarding table is empty.a. When A sends a frame to B, which hosts receive it? _____A, C, D__________________b. When B sends a reply to A, which hosts see it? __________A________________c. If X were a Hub, which hosts would see the reply? _______B, C, D_________________4.Unique Mac addresses are in ROM in each adapter card.
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AT&T Mobility, MAC addresses, a. ______gateway router__________, b. _____________local DNS