Chapter 10 - Analyzing Ethernet LAN Designs Flashcards
Which of the following devices would be in the same collision domain as PC1?
a. PC2, which is separated from PC1 by an Ethernet hub
b. PC3, which is separated from PC1 by a transparent bridge
c. PC4, which is separated from PC1 by an Ethernet switch
d. PC5, which is separated from PC1 by a router
A.
A collision domain contains all devices whose frames could collide with frames sent by all the other devices in the domain. Bridges, switches, and routers separate or segment a LAN into multiple collision domains, whereas hubs and repeaters do not.
Which of the following devices would be in the same broadcast domain as PC1?
(Choose three answers.)
a. PC2, which is separated from PC1 by an Ethernet hub
b. PC3, which is separated from PC1 by a transparent bridge
c. PC4, which is separated from PC1 by an Ethernet switch
d. PC5, which is separated from PC1 by a router
A, B, and C.
A broadcast domain contains all devices whose sent broadcast frames should be delivered to all the other devices in the domain. Hubs, repeaters, bridges, and switches do not separate or segment a LAN into multiple broadcast domains, whereas routers do.
In a two-tier campus LAN design, which of the following are typically true of the topology design?
(Choose two answers.)
a. The design uses a full mesh of links between access and distribution switches
b. The design uses a partial mesh of links between access and distribution switches
c. The design uses a partial mesh of links between the distribution and core switches
d. The end user and server devices connect directly to access layer switches
B and D.
The access layer switches play the role of connecting to the endpoint devices, whether they are end-user devices or servers. Then, from the access to the distribution layer, each access layer connects to two distribution switches typically, but with no direct connections between access layer switches, creating a mesh (but a partial mesh). A two-tier design, also called a collapsed core, does not use core switches at all.
In a three-tier campus LAN design, which of the following are typically true of the topology design?
(Choose two answers.)
a. The design uses a partial mesh of links between access and distribution switches
b. The design uses a full mesh of links between access and distribution switches
c. The design uses a partial mesh of links between the distribution and core switches
d. The end user and server devices connect directly to distribution layer switches
A and C.
The access layer switches, not the distribution layer switches, play the role of connecting to the endpoint devices, whether they are end-user devices or servers. Then, from the access to the distribution layer, each access layer connects to two distribution switches typically, but with no direct connections between access layer switches, creating a mesh (but a partial mesh). A three-tier design, also called a core design, does use core switches, with a partial mesh of links between the distribution and core switches. Basically, each distribution switch connects to multiple core switches, but often does not connect directly to other distribution switches.
Which one answer gives the strongest match between one part of a typical three-tier design with the idea behind the listed generic topology design term?
a. The access layer looks like a partial mesh.
b. The distribution layer looks like a full mesh.
c. The distribution layer looks like a hybrid design.
d. The access layer looks like a star design.
D.
The access layer uses access switches, which connect to endpoint devices. A single access switch with its endpoint devices looks like a star topology. The distribution layer creates a partial mesh of links between the distribution switches and access switches, so it is neither a full mesh nor a hybrid.
Which of the following Ethernet standards support a maximum cable length of longer than 100 meters?
(Choose two answers.)
a. 100BASE-T
b. 1000BASE-SX
c. 1000BASE-T
d. 1000BASE-LX
B and D.
The IEEE Ethernet standards support 100-meter links when using UTP cabling. Most standards that use fiber-optic cabling, like the standards in the two correct answers, use lengths longer than 100 meters.
