Chapter 1 Network Technologies, Topologies and Types Flashcards
You are implementing a 1000BASE-T network. Which physical topology does the network use?
Star/hub-and-spoke
The 1000BASE-T standard defines an Ethernet network using a twisted-pair cable, which would be configured in a physical star, or hub-and-spoke, configuration. While the physical configuration in this case is that of a star, when it comes to the logical topology, it is important to know that an Ethernet network utilizes a bus topology.
What is replacing hypervisors in virtualization?
Containers
Whereas once it was the case that hypervisors were the only way to have virtualization, now most think of containers as their successor. You should know that the use of containers (a piece of software bundled with everything that it needs to run—code, runtime, system tools, system libraries, and so on) are becoming more common.
File systems built on top of SANs can provide file-level access, but the SAN (storage area network) itself does not provide file abstraction, only operations at what level?
Block Level
A storage-area network (SAN) consists of networked/shared storage devices, are a subset of LANs, and allow you to use multiple devices to increase performance at block-level data storage.
With leased lines, which of the following offers transmission speeds of 44.736 Mbps, using 672 64-Kbps B channels?
T3
T3 lines offer transmission speeds of 44.736 Mbps, using 672 64-Kbps B channels.
Which of the following implements many of the principles from cloud computing at the WAN level by adopting a virtual WAN architecture?
SDWAN
The concept behind a storage-defined wide-area network (SDWAN) is to take many of the principles that make cloud computing so attractive and make them accessible at the WAN level. This is done by adopting a virtual WAN architecture leveraging a combination of transport services (MPLS, 5G, LTE, broadband, etc.) to securely connect users to applications.
As a network administrator, you are called in to troubleshoot a problem on a token ring network. The network uses two MSAUs connected using the ring-in ports on both devices. All network cards are set at the same speed. What is the likely cause of the problem?
MSAU configuration
To create the complete ring, the ring-in (RI) port on each MSAU is connected to the ring-out (RO) port on another MSAU. The last MSAU in the ring is then connected to the first to complete the ring.
What hardware is located at the demarcation point?
SmartJack
You need some form of hardware at the demarcation point: this is usually the smartjack, also known as the network interface device (NID).
Of the following DSL options, which offers the highest potential download speed?
ADSL2+
SDSL
ZDSL
HDSL
ADSL2+
ADSL2+ offers potential download speed of 24 Mbps. SDSL offers up to 1.5 Mbps, HDSL offers download speed up to 768 Kbps, and ZDSL is not a valid choice.
Which of the following transmission rates is possible with OC-3 optical connections?
155.52 Mbps
With optical connections, transmission rates of 155.52 are possible with OC-3. Transmission rates of 1.244 Gbps are possible with OC-24. Transmission rates of 4.976 Gbps are possible with OC-96. Transmission rates of 9.953 Gbps are possible with OC-192.
With leased lines, which leased lines offer transmission speeds of 1.544 Mbps and can create point-to-point dedicated digital communication paths (and are commonly used for connecting LANs)?
T1
T1 lines offer transmission speeds of 1.544 Mbps and can create point-to-point dedicated digital communication paths. T1 lines have commonly been used for connecting LANs.
Which of the following transmission rates is possible with OC-192 optical connections?
1.244 Gbps
4.976 Gbps
9.953 Gbps
155.52 Mbps
9.953 Gbps
With optical connections, transmission rates of 9.953 Gbps are possible with OC-192. Transmission rates of 4.976 Gbps are possible with OC-96. Transmission rates of 1.244 Gbps are possible with OC-24. Transmission rates of 155.52 are possible with OC-3.
In North America, T3 leased lines are often referred to as which of the following?
DS3
Triple Net Lines
Type III
EC3
DS3
Digital signal 3 (DS3) is a more accurate name in North America, but T3 is what most refer to the link as.
Which of the following is a method of virtualizing network services instead of running them on proprietary hardware?
SDWAN
NFV
WLAN
NFC
NFV
Network function virtualization (NFV) is a method of virtualizing network services instead of running them on proprietary hardware. This is not true of the other options presented.
Which of the following acts as a translator between the LAN data and the WAN data?
Aggregators
GRE
CSU/DSU
GMAT
CSU/DSU
A channel service unit/data service unit (CSU/DSU) acts as a translator between the LAN data format and the WAN data format.
A cable modem traditionally has a coaxial connection for connecting to the provider’s outlet and what type of connection for connecting directly to a system or to a hub, switch, or router?
STP
RJ-45
UTP
BNC
UTP
A cable modem traditionally has a coaxial connection for connecting to the provider’s outlet and an unshielded twisted-pair (UTP) connection for connecting directly to a system or to a hub, switch, or router.
