Cisco CCNA mock exam questions sample test – Question 108

.Which of the following topologies is used in Wide Area Networks (WANs)?

A. FDDI
B. CDDI
C. SONET
D. Token Ring


Correct Answer: C

Explanation:
Synchronous Optical NETwork (SONET) is the standard topology for fiber optic networks. Developed in 1980s, SONET can transmit data at rates of up to 2.5 gigabits per second
(Gbps).
All other options are incorrect because they are LAN topologies, not WAN topologies.
Fiber Distributed Data Interface (FDDI) specifies a 100-Mbps dual-ring fiber optics-based token-passing LAN. FDDI is typically implemented for high-speed LAN backbones because
of its support for high bandwidth.
Copper Distributed Data Interface (CDDI) is copper version of FDDI. They differ only in that FDDI can span longer distances than CDDI due to the attenuation characteristics of copper
wiring.
Token Ring/IEEE 802.5 LAN technology was developed by IBM in 1970. Token-ring LAN technology is based on token-passing, in which a small frame, called a token, is passed
around the network. Possession of the token grants the node the right to transmit data. Once the data is transmitted, the station passes the token to the next end station.
Objective:
Network Fundamentals
Sub-Objective:
Compare and contrast network topologies
References:
Cisco>Home>Cisco Documentation > Internetworking Technology Handbook>WAN Technologies