Ethernet Switching Flashcards
What is the distance limitation of a 1000BASE-T Ethernet network?
a. 100 m
b. 185 m
c. 500 m
d. 2 km
Answer: a. A 1000BASE-T Ethernet network has a distance limitation of 100 m.
If two devices simultaneously transmit data on an Ethernet network and a collision occurs, what does each station do in an attempt to resend the data and
avoid another collision?
a. Each device compares the other device’s priority value (determined by
IP address) with its own, and the device with the highest priority value
transmits first.
b. Each device waits for a clear-to-send (CTS) signal from the switch.
c. Each device randomly picks a priority value, and the device with the
highest value transmits first.
d. Each device sets a random back-off timer, and a device attempts retransmission after the timer expires.
Answer: d. A random back-off timer is used in a CSMA/CD network when a
collision is detected.
What kind of media is used by 100GBASE-SR10 Ethernet?
a. UTP
b. MMF
c. STP
d. SMF
Answer: b. 100GBASE-SR10 Ethernet uses multimode fiber.
Which of the following statements are true regarding VLANs? (Choose two.)
a. A VLAN has a single broadcast domain.
b. For traffic to pass between two VLANs, that traffic must be routed.
c. Because of a switch’s MAC address table, traffic does not need to be
routed to pass between two VLANs.
d. A VLAN has a single collision domain.
Answer: a, b. VLANs are also IP subnets. A router must route between these
subnets. The VLAN is also a broadcast domain.
What name is given to a VLAN on an IEEE 802.1Q trunk whose frames are
not tagged?
a. Native VLAN
b. Default VLAN
c. Management VLAN
d. VLAN 0
Answer: a. The 802.1Q native VLAN is the only VLAN in a Layer 2 domain
that is not tagged.
In a topology running STP, every network segment has a single
______________ port, which is the port on that segment that is closest to the
root bridge in terms of cost.
a. Root
b. Designated
c. Nondesignated
d. Nonroot
Answer: b. The designated port is forwarding, and there must be one on every
network segment. Remember that all root ports are designated by default.
What is the IEEE standard for link aggregation?
a. 802.1Q
b. 802.3ad
c. 802.1d
d. 802.3af
Answer: b. 802.3ad is the open-standard version of link aggregation.
What is the maximum amount of power a switch is allowed to provide per
port, according to the IEEE 802.3af standard?
a. 7.7W
b. 15.4W
c. 26.4W
d. 32.4W
Answer: b. The IEEE 802.3af standard specifies 15.4W as the maximum
amount of power a switch is allowed to provide per port.
What switch feature allows you to connect a network sniffer to a switch port
and tells the switch to send a copy of frames seen on one port out the port to
which your network sniffer is connected?
a. Port interception
b. Port duplexing
c. Port mirroring
d. Port redirect
Answer: c. Port mirroring permits frame analysis in a switched network.
Which IEEE 802.1X component checks the credentials of a device wanting to
gain access to a network?
a. Supplicant
b. Authentication server
c. Access point
d. Authenticator
Answer: b. 802.1X features a supplicant, an authentication server, and an
authenticator. The authentication server is responsible for actually checking
the credentials.
