CCNA 3 Ch 1

A company has deployed four 48-port access layer switches to a switch block. For redundancy each access layer switch will connect to two distribution layer switches. Additionally, link aggregation will be used to combine 10 Gbps interfaces to form 20 Gbps trunk links from the access layer switches to the distribution layer switches. How many switch ports on the access layer switches will be available in the switch block to support end devices? 188 184 192 176

176 Refer to curriculum topic: 1.2.1 The four 48-port switches have a total of 192 switch ports. To connect the four access layer switches to the two distribution layer switches will require eight trunk links (2 per access layer switch). Each trunk link is composed of two aggregated physical switch ports on the access layer switches. Sixteen switch ports total are needed for trunk connections to the distribution layer switches, leaving 176 switch ports for end device connections.

How much traffic is a 48-port gigabit switch capable of switching when operating at full wire speed? 24 Gb/s, because this is the maximum forwarding rate on Cisco switches 44 Gb/s, due to overhead requirements 1 Gb/s, because data can only be forwarded from one port at a time 48 Gb/s, by providing full bandwidth to each port

48 Gb/s, by providing full bandwidth to each port Refer to curriculum topic: 1.2.1 A switch operating at full wire speed is capable of switching the cumulative amount of each port on the switch. A 48-port gigabit switch could forward (48 x 1 Gb/s = 48 Gb/s) of data. Forwarding rates are determined based on the capabilities of each switch.

Which two types of connections can be used for out-of-band configuration for a Cisco IOS network device? (Choose two.) AUX console virtual lines serial Ethernet

AUX console Refer to curriculum topic: 1.2.3 Ethernet or serial connections can be used for in-band configurations. A direct connection to the device provided through the console or AUX ports is needed for out-of-band management.

Which feature could be used in a network design to increase the bandwidth by combining multiple physical links into a single logical link? trunk ports VLANs EtherChannel subinterfaces

EtherChannel Refer to curriculum topic: 1.1.2 VLANs create several groups of users which use a single physical link. Trunk ports are single physical links. Subinterfaces allow one physical link to be used to create several logical links. EtherChannel provides the ability to combine multiple physical links into a single logical link.

What is a characteristic of out-of-band device management? It requires at least one network interface on the device to be connected and operational. It requires a terminal emulation client. Out-of-band device management requires a direct connection to a network interface. It requires Telnet, SSH, or HTTP to access a Cisco device.

It requires a terminal emulation client. Refer to curriculum topic: 1.2.3 Out-of-band device management is used for initial configuration or when a network connection is unavailable. Configuration that uses out-of-band management requires a direct connection to a console or AUX port and a terminal emulation client.

Which technology is required when switched networks are designed to include redundant links? virtual private networks Spanning Tree Protocol link aggregation virtual LANs

Spanning Tree Protocol Refer to curriculum topic: 1.1.2 Spanning Tree Protocol (STP) is required when switched networks include redundant Layer 2 links. VLANs, VPNs, and link aggregation are not related to link redundancy in network design.

What is the function of PoE pass-through? allows a multilayer switch to forward IP packets at a rate close to that of Layer 2 switching by bypassing the CPU allows a switch to disable redundant Layer 2 paths in the topology to prevent Layer 2 loops allows multiple physical switch ports to be aggregated together and act as a single logical link to increase bandwidth on trunk links allows switches, phones, and wireless access points to receive power over existing Ethernet cables from an upstream switch

allows switches, phones, and wireless access points to receive power over existing Ethernet cables from an upstream switch Refer to curriculum topic: 1.2.1 PoE or Power over Ethernet allows devices such as wireless access-points and IP phones to receive power from PoE enabled switch ports. PoE pass-through allows a switch to receive power from an upstream switch and pass it through to PoE devices.

Fill in the blank. Among the beneficial functions of a router are enhanced network security and containment of _________________ traffic.

broadcast Refer to curriculum topic: 1.2.2

Match the design model layer to the appropriate network function. (Not all options are used.) core layer distribution layer access layer

core layer - provides a high-speed backbone line between dispersed networks distribution layer - forwards traffic from one local network to another access layer - provides connectivity for the users Refer to curriculum topic: 1.1.1

What is the term that is used for the area of a network that is affected when a device or network service experiences problems? user domain failure domain collision domain broadcast domain

failure domain Refer to curriculum topic: 1.1.1 A failure domain is a portion of the network that is affected when a device or service fails or experiences problems.

Which network design solution will best extend access layer connectivity to host devices? implementing routing protocols implementing redundancy implementing wireless connectivity implementing EtherChannel

implementing wireless connectivity Refer to curriculum topic: 1.1.2 EtherChannel allows more data to be moved at the access layer, but does not provide network expansion. Redundancy is used to provide failover solutions but does not focus on network expansion. Routing protocols are not used to provide network expansion at the access layer. Wireless connectivity provides network access to a large number of users at the access layer.

Which two methods help to prevent the disruption of network services? (Choose two.) removing switches which cause loops installing duplicate equipment to provide failover services using VLANs to segment network traffic changing the routing protocols at regular intervals using redundant connections to provide alternate physical paths

installing duplicate equipment to provide failover services using redundant connections to provide alternate physical paths Refer to curriculum topic: 1.1.2 Using duplicate equipment and using redundant paths are two methods to help prevent network disruptions. The use of VLANs would not affect network availability. Changing the routing protocol could actually reduce availability during convergence. Loops, which are created by the provision of redundant paths, are managed by protocols without removing devices.

Which type of router would an enterprise use to allow customers to access content anytime and anyplace, regardless of whether they are at home or work? modular routers branch routers service provider routers network edge routers

network edge routers Refer to curriculum topic: 1.2.2 Network edge routers provide customer interactivity, personalization, and mobility. Wherever customers can access an Internet connection, they can access their content. Branch routers provide simple network configuration and management while maintaining highly available networks. Modular routers are used to provide greater flexibility in which interfaces are used during network design and installation. Service provider routers provide end-to-end scalable solutions. Customers do not remotely access or connect directly to a service provider router.

Fill in the blank. The number of ports available on a single switch is referred to as ________________________ .

port density Refer to curriculum topic: 1.2.1