Network Topologies and Types Flashcards
What DSL variant has a distance limitation of 18,000 feet between a DSL
modem and its DSLAM?
a. HDSL
b. ADSL
c. SDSL
d. VDSL
Answer: b. ADSL has a distance limitation of 18,000 feet between a DSL
modem and its DSLAM. Remember that ADSL features different upload and
download speeds.
What kind of network do many cable companies use to service their cable
modems with both fiber-optic and coaxial cabling?
a. Head-end
b. DOCSIS
c. Composite
d. HFC
Answer: d. An HFC distribution network typically features multiple media
types.
Which of these components is used to make virtualization possible in the
server environment by permitting multiple systems to use the underlying
hardware of the host system?
a. vNIC
b. vSwitch
c. SD-WAN
d. Hypervisor
Answer: d. Virtualization is possible with servers thanks to specialized software called a hypervisor. The hypervisor is used to manage multiple virtual
machines (VMs) existing on one host.
Which technology allows enterprises to leverage a combination of transport
services such as MPLS, 5G, LTE, or broadband to securely connect users to
applications?
a. mGRE
b. SD-WAN
c. Smartjack
d. Demarcation
Answer: b. SD-WAN makes many of the principles that make cloud computing SD-WAN brings cloud computing advantages to the WAN at the WAN
level. This is done by adopting a virtual WAN architecture leveraging a combination of transport services (MPLS, 5G, LTE, broadband, and so on) to
securely connect users to applications.
A company has various locations in a city interconnected using Metro Ethernet connections. This is an example of what type of network?
a. WAN
b. CAN
c. PAN
d. MAN
Answer: d. A metropolitan area network is superb for connecting various
buildings in a citywide area. Metro Ethernet is one example of connectivity
technology for this design.
A network formed by interconnecting a PC to a digital camera via a USB cable
is considered what type of network?
a. WAN
b. CAN
c. PAN
d. MAN
Answer: c. A personal area network features fewer nodes than are typically
found in a LAN. This design also features a small geographic area, such as a
car or a single-room office.
Which of the following physical LAN topologies requires the most cabling?
a. Bus
b. Ring
c. Star
d. WLAN
Answer: c. The star topology is common today in switched LANs. However,
it does feature quite a bit of cabling, as the switches require media to each
and every node (wired) that needs to communicate. There are also typically
trunk connections between the switches for an extended star topology, and this
means even more cabling.
Which of the following topologies offers the highest level of redundancy?
a. Full mesh
b. Hub and spoke
c. Bus
d. Partial mesh
Answer: a. The full-mesh topology might be complex and expensive to implement, but it does provide excellent levels of redundancy. In the event that one
or more links fail, it is often possible to reroute traffic around the failures.
How many WAN links are required to create a full mesh of connections
between five remote sites?
a. 5
b. 10
c. 15
d. 20
Answer: b. The formula for the number of connections required for the fullmesh topology is n (n – 1) / 2, where n is the number of nodes. So, in this case,
5 (5 – 1) / 2 is 10.
Which of the following are advantages of a hub-and-spoke WAN topology as
compared to a full-mesh WAN topology? (Choose two.)
a. Lower cost
b. Optimal routes
c. More scalable
d. More redundancy
Answer: a, c. The hub and spoke is actually a form of a partial-mesh topology.
This topology has the advantage of being less complex, less costly, and, overall,
more scalable than a full-mesh design.
Which type of network is based on network clients sharing resources with one
another?
a. Client/server
b. Client/peer
c. Peer-to-peer
d. Peer-to-server
Answer: c. A peer-to-peer (P2P) network features clients sharing information
directly with each other.
Which of the following is an advantage of a peer-to-peer network as compared
with a client/server network?
a. More scalable
b. Less expensive
c. Better performance
d. Simplified administration
Answer: b. P2P networks are often celebrated for their simplicity and low
cost. Unfortunately, these networks are not scalable and can actually cause
administrative nightmares when scaling is required.
What network type would help facilitate communications when large video or
audio files need to be housed and transferred through the network?
a. WLAN
b. CAN
c. PAN
d. SAN
Answer: d. The storage area network (SAN) assists when large amounts of
data must be stored in the network and transferred efficiently from various
nodes to other nodes.
