2.2 Networking hardware Flashcards
Compare and contrast common networking hardware
A network administrator can configure a small office home office (SOHO) router to provide an IPv4 address configuration to hosts without further administrator attention. A technician wrote some notes about IPv4 addresses used in various networks associated with the company support tickets. The technician assigned one of the addresses to the WAN interface of a SOHO router that requires troubleshooting. Which of these addresses must it be?
-192.168.100.52
-224.100.100.1
-169.254.1.121
-52.165.16.254
52.165.16.254
*The WAN interface of the router must use an IPv4 address from a valid public range, so 52.165.16.254 is the only one to use on a SOHO router.
~The address 192.168.100.52 is in the class B and class C private ranges. Hosts with IP addresses from these ranges are not allowed to route traffic over the public internet.
~Address 169.254.1.121 is in the range reserved for APIPA (automatic private IP addressing). Therefore, it can communicate with other hosts on the same network that uses APIPA but not hosts with a valid DHCP lease.
~Address 224.100.100.1 is outside the range of valid public addresses and is part of class D, which is for a type of addressing called “multicasting.”
The company network specialist assisted a customer with a full fiber connection terminated to an optical network terminal (ONT). Unfortunately, during some construction work on the building, the IT department disconnected the customer’s router, and the patch cable is now missing. The customer thinks the cable is fiber-optic since the service is “full fiber.” What type of cable does the network specialist need to locate?
-A copper wire VGA, HDMI, or USB adapter cable
-An RJ45 unshielded twisted pair (UTP) patch cable
-An RJ11-terminated path cord asymmetrical (DSL)
-An RS-232 serial port cable
An RJ45 unshielded twisted pair (UTP) patch cable
*The RJ45 unshielded twisted pair (UTP) patch cable will allow the ONT to convert the optical signal over the external fiber optic cable to an electrical one to connect to the local router.
~An RJ11 asymmetrical DSL (ADSL) provides a fast downlink but a slow uplink and is typically used to terminate two-pair cable widely used in telephone systems and broadband DSL modems.
~A basic peripheral cable will not provide an Ethernet connection between a port available on the ONT and the port used on the peripheral device.
~The serial port is a legacy connection interface where data is transmitted over one wire one bit at a time, and the interface uses much less sophisticated signaling methods.
The TIA/EIA-568 standard defines two methods for terminating twisted pairs: T568A or T568B. In T568A, pin 1 is wired to green/white, pin 2 is wired to green, pin 3 is wired to orange/white, and pin 6 is wired to orange. In T568B, the position of the green and orange pairs swap over so that orange terminates to 1 and 2, while green terminates to 3 and 6. What is the reason for this specific standard?
-To use the same termination method consistently to support a Gigabit Ethernet or an upgrade to an optical network terminal
-To use PoE 802.3bt installations and run distribution system cables to wireless access points
-To rewire a network with Cat 5 cables to support twisted pair for Gigabit Ethernet switches
-To terminate Cat 5 cable into a two-pair cable used in telephone systems and broadband digital subscriber line modems
To use the same termination method consistently to support a Gigabit Ethernet or an upgrade to an optical network terminal
*A network administrator wires a straight-through Ethernet cable with the same type of termination at both ends. Using T568A at one end and T568B at the other creates a crossover cable, but Gigabit Ethernet interfaces can crossover automatically even if using a standard cable.
~Power over Ethernet (PoE) 802.3bt installations run distribution system cables to wireless access points with a Cat 6A cable, but it will likely cost more.
~Twisted-pair cables can typically use RJ11 connectors to terminate two-pair cables used in telephone systems and broadband DSL modems.
~A Cat 5e would still be an acceptable choice for providing Gigabit Ethernet links as it supports the older 100 Mbps Fast Ethernet standard but is not commercially available.
A network administrator is expanding the company network with new settings and requirements for switches, VLANs, and IP subsets. What is the purpose of what the administrator is doing?
-To match the cable type and switches with sufficient ports to meet demand on the enterprise network
-To use unmanaged switches to connect more clients without requiring configuration or intervention
-To assign an FQDN, managed by using a DNS within the organization VLAN
-To divide the VLAN into multiple secure broadcast domains through managed switches, allowing additional remote access via VPNs
To divide the VLAN into multiple secure broadcast domains through managed switches, allowing additional remote access via VPNs
*A virtual local area network’s (VLAN) ports can divide into groups using a feature of managed switches to allow additional remote access via VPNs.
~Domain Name System assigns and manages fully qualified domain names (FQDNs). DNS is a global hierarchy containing information on the distributed name server databases and is not needed to expand a network.
~Larger workgroups and corporate networks with VLANs require additional functionality in their managed switches. An unmanaged switch performs its function without requiring any sort of configuration.
~Patch panels match the cable type and switches with sufficient ports to meet the requirement and are unnecessary in expanding the enterprise network with managed switches.
A network administrator is completing an installation as part of a team. Another group cabled the wall ports but left the ends of the cables bundled in the network closet. What additional infrastructure will the network administrator require to complete this installation? (Select all that apply.)
-A switch
-A hub
-A modem or router
-A patch panel
A switch & A patch panel
*The administrator needs to install a networking appliance to act as a concentrator, connecting the cable segments like a switch, then cabling it to the patch panel ports using RJ45 patch cords.
*The patch panel terminates cabling but does not establish any connections between the cable segments. However, the patch panel needs to connect with the other group in this scenario.
~The DSL modem or router might be provisioned as a separate device or embedded as a function of a small office or home office (SOHO) router. Since every connection wires directly between groups, a router/modem is unnecessary in this scenario.
~A hub is a legacy network hardware device to implement the 10BASE-T and 100BASE-T Ethernet cabling designs and is no longer in use.
Either electrical signaling establishes Ethernet communications over copper twisted pair cable or pulses of light transmitted over fiber optic cable. Where is the physical connection to the cable made in the computer using a transceiver port?
-Digital subscriber line (DSL)
-Docking station
-Network interface Card (DSL)
-Optical network terminal (ONT)
Network Interface Card (NIC
*All PCs have a built-in motherboard or network interface card (NIC) that directly connects the network for both copper and fiber optic lines.
~The ONT is a splitter connected to a router that requires an RJ45 copper wire patch cord to provide a direct connection and cannot connect with fiber optic lines.
~A sysadmin must configure a DSL to connect to the network through a hardware appliance, such as a small office home office (SOHO) router, modem, or switch using copper wires, not fiber optics.
~A docking station is a port replicator that attaches to a special connector on the back or underside of a laptop; therefore, a portable machine can function as a desktop machine.
What device uses an embedded adapter to forward traffic through hardware ports between public and private network segments? (Select all that apply.)
-Firewall
-Patch panel
-SOHO Router
-Switch
Firewall, SOHO router, & Switch
*A small office or home office (SOHO) will generally use a single wireless router, which combines the functions of a router, DSL/cable modem, Ethernet switch, and Wi-Fi access point to provide connectivity.
*The role of filtering allowed and denied hosts and protocols is performed by a network firewall. A basic firewall is configured with rules, referred to as a network access control list (ACL).
*An Ethernet switch provisions one port for each device that needs to connect to the network.
~The patch panel terminates cabling and does not establish any connections between the cable segments to any networks or internet to provide connectivity.
Another group has cabled wall ports to a patch panel during a previous construction. Now, the company network administrator is completing the remaining network installation as part of a team effort, and it will require additional infrastructure to complete this installation. What does the network administrator need to finish the network?
-Modem or router
-A hub
-Network Interface Card (NIC)
-A switch
A switch
*The administrator needs to install a networking appliance to act as a concentrator, connecting the cable segments like a switch, then cabling it to the patch panel ports using RJ45 patch cords.
~A network interface card (NIC) or another adapter would already be installed as part of the motherboard chipset or upgraded to a different network, such as fiber optic, and would not be necessary.
~A DSL modem might be used as a separate device or embedded as a function of a small office or home office (SOHO) router, but every connection would be wired directly between groups.
~A hub is a legacy network hardware device to implement the 10BASE-T and 100BASE-T Ethernet cabling designs and is no longer in use.
A network administrator plans to install a network of wireless access points with power supplied over data cabling. Each access point requires a 20W power supply. What version of Power over Ethernet (PoE) must the switch support to fulfill this requirement? (Select all that apply.)
-An 802.3af switch
-POE++/4POE (802.3bt)
-POE+ (802.3at)
-POE-power injector
POE++/4POE (802.3bt) & POE+ (802.3at)
*Power over Ethernet (PoE) 802.3at (PoE+) allows powered devices to draw up to about 25W, with a maximum current of 600 mA.
*Power over Ethernet (PoE) 802.3bt (PoE++ or 4PPoE) supplies up to about 51W (Type 3) or 73W (Type 4) usable power.
~Power over Ethernet (PoE) 802.3af allows powered devices to draw up to about 13W supplied as 350mA@48V, limited to 15.4 W, so the voltage drops over the maximum 100 feet of cable, resulting in usable power of only around 13W.
~The administrator can use a “power injector” or “midspan” with one port on the injector connected to a switch port and the other port connected to the device. However, the overall cable length cannot exceed 100m.
All PC motherboards have a built-in 1000BASE-T compatible adapter to establish connectivity with the Ethernet. What other devices connect to different types of Ethernets, such as fiber optics? (Select all that apply.)
-Network interface card (NIC
-Modem
-SOHO router
-Patch panel
Network interface card (NIC,) Modem, & SOHO router
*A small office or home office (SOHO) will generally use a single wireless router, which combines the functions of a router, DSL/cable modem, Ethernet switch, and Wi-Fi access point to provide connectivity.
*A cable modem forwards data traffic via the fiber backbone to the ISP’s point of presence and then to the internet via several access ports.
*An NIC adapter card will support other types of Ethernet, such as fiber optic. Motherboards have a built-in 1000BASE-T compatible adapter.
~The patch panel terminates cabling and does not establish any connections between the cable segments to any networks or internet to provide connectivity.
The network administrator wants to deploy one or more access points to provision a wireless network supporting a given range of protocols/standards containing supports, such as RADIUS, Kerberos, and TACACS+, with nonoverlapping channels. TACACS+, RADIUS, and Kerberos are another way of doing what?
-Implementing AAA service on a server or network for enterprise authentication
-Configuring protocols of multiple SSIDs, such as a secure network for known clients and an open network for guests
-Allowing hardware assets access to software licenses assigned to user accounts via the firewall
-Using enterprise mobility management (EMM) network software to apply security policies to mobile devices in the enterprise network
Implementing AAA service on a server or network for enterprise authentication
*An AAA service allows network edge devices to process access requests by supplicants without holding a copy of the directory and associated credentials. While Kerberos has no direct access points, RADIUS authenticates VPN connections, and TACACS+ is for administrative access to routers and switches.
~A baseline firewall has technical security controls ensuring a secure configuration but not access to software licenses.
~EMM applies security policies to mobile devices and authorization to corporate applications, preventing the transfer of corporate data to personal applications.
~A service set identifier (SSID) is an ASCII band that clients identify as a wireless local area network (WLAN), with each band assigned an SSID or network name and access points allowing the configuration of multiple SSIDs per radio.
