4.3.4 Practice Questions

You want to connect the LAN port on a router to the uplink port on a switch. The switch does not support auto-MDI. Which type of cable should you use?

Crossover Use a crossover cable to connect a workstation or a router to the uplink port on a switch. Use a straight-through cable to connect the router to a regular switch port. Use a rollover cable to connect a workstation to the console port of a router. Use a loopback plug to allow a device to communicate with itself through its own network adapter.

You are implementing a SOHO network for a local business. The ISP has already installed and connected a cable modem in the business. The business has four computers that need to communicate with each other and the internet. The ISP's cable modem has only one RJ45 port. You need to set up the network within the following parameters: You must spend as little money as possible. You must not purchase unnecessary equipment. Computers need to have a gigabit connection to the network. New devices should not require management or configuration. You examine each computer and notice only one of the four computers has a wireless NIC; they all have Ethernet NICs. What should you purchase?

An unmanaged switch and CAT 5e cabling. You should purchase an unmanaged switch and CAT 5e cabling. Switches offer guaranteed bandwidth to each switch port and full-duplex communication. Unmanaged switches are autonomous in their function, requiring no port management or configuration. CAT 5e cabling supports transfer speeds up to 1000 Mbps. Purchasing a new cable modem with a built-in switch would be more expensive than an unmanaged switch. Additionally, CAT6a cabling is unnecessary for this type of network. Because all of the computers already have wired NICs, purchasing a wireless AP and three new wireless NICs would introduce new costs. The wireless AP would also require additional management and configuration. Hubs suffer from collisions, so only half-duplex communication is possible. This wouldn't support 1000 Mbps speeds. A small business with four computers doesn't need the additional features that a managed switch provides.

You want to create a rollover cable that has an RJ45 connector on both ends. How should you connect the wires within the connectors?

Connect pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, and pin 4 to pin 5. When terminated with an RJ45 connector on both ends, the wires within the connectors are rolled over to the opposite connector as follows: Pin 1 connects to pin 8 Pin 2 connects to pin 7 Pin 3 connects to pin 6 Pin 4 connects to pin 5 A crossover cable uses the T568A standard on one end and the T568B standard on the other end. The crossover cable connects pin 1 to pin 3 and pin 2 to pin 6. Connecting each pin to the same pin on the other end creates a straight-through cable.

You need to transfer data from one laptop to another, and you would like to use an Ethernet cable. You do not have a hub or a switch. Which type of cable should you use?

Crossover Use a crossover cable to connect two devices together in a back-to-back configuration. Use a straight-through cable to connect a workstation to a hub or switch port. Use a rollover cable to connect a workstation to the console port of a router or a switch. Use a loopback plug to allow a device to communicate with itself through its own network adapter.

You need to connect two switches using their uplink ports. The switches do not support auto-MDI. Which type of cable should you use? Straight-through

Crossover Use a crossover cable to connect two switches through their uplink ports or to connect two switches through regular ports. Use a straight-through cable to connect the uplink port on one switch to a regular port on another switch. Use a rollover cable to connect a workstation to the console port of the switch. Use a loopback plug connected to a single port for troubleshooting.

Which of the following standards is typically used in a rollover cable?

RS232 A rollover cable has a serial connector on one end and an RJ45 connector on the other end. RS232 is the standard for serial communications. RJ11 connectors are used for analog telephone lines. RG6 and RG58 are coaxial cable standards.

You have purchased a new router that you need to configure. You need to connect a workstation to the router's console port to complete the configuration tasks. Which type of cable would you most likely use?

Rollover Use a rollover cable to connect a workstation to the console port of a router or a switch. The rollover cable has an RJ45 connector on one end to connect to the console port. The other end has a serial connector to connect to the serial port of the workstation. You then run a terminal emulation program on the workstation to connect to the console of the router or switch to perform configuration and management tasks.

Which of the following connectors is typically used on one end of a rollover cable?

Serial A rollover cable has a serial connector on one end and an RJ45 connector on the other end. Alternatively, it might have an RJ45 connector on both ends and use a serial converter to convert from the RJ45 connector to a serial connector. BNC and F-type connectors are used with coaxial cables. ST, SC, and LC connectors are used with fiber optic cables.

You need to connect a workstation to a switch using a regular port on the switch (not an uplink port). The switch does not support auto-MDI. Which type of cable should you use?

Straight-through Use a straight-through cable to connect a workstation or router to a regular switch port. Use a crossover cable to connect the workstation to the uplink port. Use a rollover cable to connect the workstation to the console port of the switch. Use a loopback plug to allow a workstation to communicate with itself through its own network adapter.