Networking (23%)

220-1201 · 69 questions

• A laptop that should use DHCP shows 169.254.22.15. It can ping other 169.254 addresses on the same switch and cannot reach the internet. Which address is this?
• Neighboring networks crowd the 2.4 GHz band at an apartment. The laptop and the access point both support 5 GHz. Which change avoids that crowd for this laptop?
• A small office firewall must allow encrypted web sessions to a local server and must keep clear-text web traffic blocked. Which port should be permitted?
• Other mail servers must learn which host receives mail for the museum's domain. Which DNS record states that?
• Three clinics in one city share the carrier's metro fiber. They are not attached to one local switch. Which network type is that fiber link?
• A lab's firewall and its log server record the same event several minutes apart. Which service should both devices use so their clocks agree?
• A shop router should hide the PCs from the internet and translate their traffic. Which address plan belongs on the inside LAN?
• Handheld scanners at a market only support 2.4 GHz. Neighboring networks already occupy channels 1 and 6. Which channel avoids overlapping those neighbors?
• A ceiling access point needs power over its Ethernet cable. The closet switch does not supply that power, and an outlet is available in the ceiling. Which device should feed the access point?
• A badge printer must keep one address from DHCP and must still learn the gateway and DNS server from the scope. Which DHCP feature does that?
• A school wants student web traffic inspected and cached before it goes out to the internet. Which service does that job?
• A technician must find which port on a patch panel belongs to an unlabeled wall jack. Which tool puts a signal on that cable and finds it at the panel?
• A building network now includes thermostats and badge readers that are not PCs and that report in over the network. Which class of device is that?
• New desk phones need power from the closet switch, and the switch on the order supplies power on its data ports. Which feature is the buyer selecting?
• An administrator needs an encrypted command-line session to a server. Which port should the firewall permit for that session?
• Ordinary name lookups from a hotel PC are connectionless. Which port and transport should the firewall allow for those lookups?
• A technician is seating copper pairs into a keystone jack's insulation-displacement contacts. Which tool does that job?
• A technician crimps both ends of a new cable and needs to see whether each pin lands on the matching pin at the other end. Which tool shows that?
• A managed switch should learn which desk computer is on which port by using the hardware address burned into that computer's network adapter. Which address is that?
• The name print.artschool.example should follow whatever address files.artschool.example already has, rather than storing an address of its own. Which DNS record does that?
• Two departments share one switch, and each department must be its own broadcast domain. Which feature does that on the switch?
• A guide's phone and wireless headset talk only to each other, within a few feet, and to nothing else. Which network type is that link?
• Users must reach file shares on a server using the protocol Windows uses for those shares. Which port should the firewall permit?
• A closet switch must put ports into separate VLANs and must support port security. Which switch meets that requirement?
• A file server is given its address, mask, and gateway by typing them on the server. It never requests a lease. Which addressing is that?
• A house gets its internet from a provider that delivers the service on the same coaxial cable as the television signal. Which connection type is that?
• Two departments are on different subnets and must reach each other. The closet has only a switch. Which device should be added?
• A DHCP scope covers the whole subnet, including the address already configured on the router. The server must never lease that address. Which DHCP feature prevents the lease?
• Clients on a segment must reach a DHCP server so they can obtain addresses. Which port does that server use?
• A PC at 192.168.10.10 with mask 255.255.255.255 cannot reach 192.168.10.20, which is on the same switch. Which setting explains that?
• A firm's office in one country and its office in another country are connected by a carrier circuit. Which network type is that circuit?
• Mail servers at two companies hand messages to each other. Which port carries that server-to-server transfer?
• Firewalls and servers at a plant should send their log messages to one collector. Which service is that collector?
• A warehouse gate reads a tag on each pallet as it passes. The tag has no battery of its own. Which technology is the tag?
• A traveler on a hotel network must reach file servers on the office LAN, and the traffic must be protected across the internet. Which technology does that?
• A technician has stripped a twisted-pair cable and needs to fasten an RJ45 plug onto the end. Which tool does the fastening?
• A small office wants a device that enforces allow and deny rules between the office LAN and the internet. Which device does that?
• A server's name should resolve to its IPv6 address. Which DNS record stores that address?
• Every computer and printer in a small office connects to one switch in that same office. Which network type is that?
• A user wants mail to stay on the server and appear on a phone and a laptop. Which port does that retrieval protocol use?
• A PC can ping other hosts on its own subnet by address, and it cannot ping a host on the far side of the router. The default gateway field is blank. Which setting is missing?
• A technician wants to test a switch port by sending its transmit signal back into its receive side. Which tool does that?
• The internet provider's cable at a house is coaxial, and the office router needs Ethernet. Which device converts that provider handoff?
• A house gets internet on the telephone line, and the router needs Ethernet from that line. Which device converts the telephone-line service?
• A museum wants other mail servers to know which hosts are allowed to send mail for its domain. Which DNS record publishes that policy?
• A user wants a mail program to download messages onto one PC and remove them from the server. Which port does that retrieval protocol use?
• Several identical web servers should share incoming requests so no one server takes the whole crowd. Which service spreads those requests?
• A technician needs to remove the outer jacket of a twisted-pair cable without nicking the conductors, before a plug is crimped. Which tool does that?
• The 5 GHz band at a clinic is crowded. The laptops and the access point both support 6 GHz. Which change moves the laptops off that crowd?
• A cabin has no telephone line and no cable plant. A dish on the roof is its only internet path. Which connection type is the dish?
• Laptops in a classroom associate to an access point and use no Ethernet cable. Which network type is that?
• Workstations query a directory server for account information. Which port does that directory protocol use?
• Clients must upload files to a server that uses FTP. Which port is the FTP control connection?
• Switches and the firewall should check administrators against one directory before allowing them to sign in. Which service performs that check?
• A provider terminates a glass strand on an optical network terminal at the building, and that terminal feeds the router. Which connection type is the strand?
• A guest Wi-Fi scope runs out of addresses because visitors' leases last all day after the visitors leave. Which DHCP change returns addresses sooner?
• A PC has only an IPv6 address that begins with fe80, and it cannot reach the internet. Other PCs with routable addresses can. Which limitation is that?
• Servers reach their disk arrays over a dedicated network that carries only that storage traffic. Which network type is that?
• Inbound mail should be filtered for spam before it reaches users' mailboxes. Which service does that filtering?
• A technician must copy traffic from a live link so it can be monitored, without disconnecting that link. Which tool does that?
• A farm's internet arrives by radio from a provider's tower to an antenna on the barn, not from a satellite dish and not from a phone line. Which connection type is that?
• Cables from the wall jacks are punched down on a row of ports in the closet. Short cords from that row run to the switch. Which device is that row?
• An internal status page is served as ordinary unencrypted web traffic. Which port should a firewall permit for that page?
• A packet capture shows a laptop receiving its DHCP offer. Which port is the laptop using for that offer?
• An application stores structured records and answers queries against those records. Which server role is that?
• A plant network monitors pumps and valves and can send control commands to that equipment. Which system type is that?
• A small office wants one appliance that provides the firewall and the other security filtering, instead of a separate box for each function. Which appliance is that?
• A technician needs a graphical remote desktop session to a Windows PC. Which port does that session use?
• A department needs one place on the network where everyone opens the same shared folders. Which server provides that place?