OSI
A Part of a network interface that sends and receives signals
What is a transceiver
Has a small core (8 to 10 microns) and a long wavelength
What is SMF
Most Ethernet networks are implemented so that each end system node is wired to a central intermediate system. In early types of Ethernet, this function was performed by a___
What is a Hub
A range of addresses and options configured for a single subnet
What is a Scope
Top-level NTP servers (stratum 1) obtain the Coordinated Universal Time (UTC) via a direct physical link to an accurate clock source, such as an atomic clock accessed over the___
What is a GPS
An advance type of bridge
What is a switch
Has a larger core (62.5 or 50 microns) and shorter wavelength light (850 nm or 1,300 nm) transmitted in multiple waves of varying length.
What is MMF
The switch has a simple, rectangular, box-like design with a white or light grey top and sides. The front panel, which is black, is populated with several rows of rectangular network ports, likely Ethernet ports, arranged in groups. On one end of the front panel, there are additional ports and indicators that might be for management consoles, power connectors, or additional expansion modules
What is a Workgroup switch
Mapping of a MAC address or interface ID to a specific IP address within the DHCP server's address pool
What is a reservation
Many applications on networks require hosts to be synchronized to the same time. These include authentication and auditing/logging mechanisms, scheduling applications, and backup software The___
What is a NTP
The collection that determines which subjects are allowed or denied access to the object and the privileges given (layer 3)
What is a ACE
Small-form-factor connector
What is LC
Supports a data payload of up to 9,216 bytes.
What is a Jumbo frame
Normally, routers do not forward broadcast traffic. This means that each broadcast domain must be served by its own DHCP server. On a large network with multiple subnets, this would mean provisioning and configuring many DHCP servers
What is a DHCP relay
If the time is off by only a few seconds, NTP adjusts the time a few milliseconds at a time to get it back on track (slower)
What is a Slew
What layer deals with end to end
What is a Layer 4
The faces of the connector and fiber tip are polished so that they reduce back reflection, curve slightly, and fit together better
What is UPC
Supplies at 60 W (Type 3) or 90 W (Type 4), with up to 51 W and 71 W usable power, respectively.
What is POE++
A Windows host that is configured to use dynamic addressing but that fails to obtain a lease will revert to an automatic IP address
What is a APIPA
If the time is off by more than a few seconds and slewing will take too long, NTP will hard reset the time (fast)
What is a Slam
Uses free space between nodes, such as microwave radio. Wireless media can also be described as unbounded media.
What is Wireless
Each lane normally requires two fiber strands (send and receive). A 40 Gbps link comprising 4 x 10 Gbps lanes therefore requires eight strands
What is MPO
A frame that is smaller than the minimum size (64 bytes for Ethernet)
What is a Runt
This___functionality can be configured on routers to allow set types of broadcast traffic (including DHCP) to be forwarded to an interface.
Works over TCP port 4460
What is a NTS