What is the default MTU size on a Cisco Ethernet interface (in bytes)? O a. 1,599 O b. 1,500 O c. 17,800 O d. 1,523

The correct answers is b. The default maximum transmission unit on a typical Ethernet interface on a Cisco router is 1,500 bytes. Earlier in this chapter, Listing 2.4 outlined a typical display on a Cisco routers Ethernet interface. Answers a, c, and d are incorrect, because they list incorrect MTU sizes. MTU size 1,599 is too high for Ethernet. MTU size 17,800 is used by Token Ring devices. MTU size 1,523 is not a maximum frame size for any device in the 802.x family.

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