question

A large business environment with many users, locations, and systems is referred to as an

answer

enterprise

question

All enterprise networks must:

answer

Support critical applications Support converged network traffic Support diverse business needs Provide centralized administrative control

question

Enterprise-class equipment is designed for reliability, with features such as

answer

redundant power supplies and failover capabilities

question

Failover capability is?

answer

the ability of a device to switch from a nonfunctioning module, service, or device to a functioning one with little or no break in service.

question

the 3 layer hierarchical design model has three layers what are they?

answer

• Access layer • Distribution layer • Core layer

question

what does the access layer do?

answer

provides connectivity for the users.

question

The distribution layer does what?

answer

The distribution layer is used to forward traffic from one local network to another.

question

what is the core layer?

answer

The core layer represents a high-speed backbone layer between dispersed networks.

question

which layers form the two-tier hierarchical design?

answer

the core and distribution layers are collapsed into one layer, reducing cost and complexity

question

what is the Cisco Enterprise Architecture?

answer

it divides the network into functional components while still maintaining the core, distribution, and access layers. The primary Cisco Enterprise Architecture modules include • Enterprise Campus • Enterprise Edge • Service Provider Edge • Remote

question

what is Enterprise Campus?

answer

The Enterprise Campus consists of the entire campus infrastructure, to include the access, distribution, and core layers. The access layer module contains Layer 2 or Layer 3 switches to provide the required port density. Implementation of VLANs and trunk links to the building distribution layer occurs here. Redundancy to the building distribution switches is important. The distribution layer module aggregates building access using Layer 3 devices. Routing, access control, and QoS are performed at this distribution layer module. The core layer module provides high-speed interconnectivity between the distribution layer modules, data center server farms, and the enterprise edge. Redundancy, fast convergence, and fault tolerance are the focus of the design in this module.

question

what are the submodules of enterprise campus?

answer

Server Farm and Data Center Module Services Module

question

what is the server farm and data center module?

answer

This area provides high-speed connectivity and protection for servers. It is critical to provide security, redundancy, and fault tolerance. The network management systems monitor performance by monitoring device and network availability

question

what is the services module?

answer

This area provides access to all services, such as IP Telephony services, wireless controller services, and unified services.

question

explain enterprise edge

answer

The Enterprise Edge consists of the Internet, VPN, and WAN modules connecting the enterprise with the service provider's network. This module extends the enterprise services to remote sites and enables the enterprise to use Internet and partner resources. It provides QoS, policy reinforcement, service levels, and security.

question

explain service provider edge

answer

The Service Provider Edge provides Internet, Public Switched Telephone Network (PSTN), and WAN services. All data that enters or exits the Enterprise Composite Network Model (ECNM) passes through an edge device. This is the point where all packets can be examined and a decision made whether the packet should be allowed on the enterprise net- work. Intrusion detection systems (IDS) and intrusion prevention systems (IPS) can also be configured at the enterprise edge to protect against malicious activity.

question

what is a failure domain?

answer

A failure domain is the area of a network that is impacted when a critical device or network service experiences problems.

question

what is used to minimize the chance of disruption in a network?

answer

redundant links and reliable enterprise-class equipment

question

In the hierarchical design model, it is easiest and usually least expensive to control the size of a failure domain in the _________ layer because network errors can be contained to a smaller area, thus affecting fewer users

answer

distribution layer

question

what is switch block/department block/building block

answer

when Routers, or multilayer switches, are deployed in pairs, with access layer switches evenly divided between them

question

Each _______ acts independently of the others. As a result, the failure of a single device does not cause the network to go down. Even the failure of an entire switch block does not affect a significant number of end users.

answer

switch block

question

Included in a basic network design strategy are the following recommendations:

answer

- Use expandable, modular equipment or clustered devices - include modules that can be added, upgraded, and modified, as necessary, without affecting the design of the other functional areas of the network - Create an IPv4 or IPv6 address strategy that is hierarchical - filter trafic

question

Advanced network design requirements include:

answer

- Implementing redundant links in the network between critical devices and between access layer and core layer devices. - Implementing multiple links between equipment, with either link aggregation (EtherChannel) or equal-cost load balancing - Implementing wireless connectivity to allow for mobility and expansion - Using a scalable routing protocol

question

what is a downside to redundant paths?

answer

logical Layer 2 loops

question

what can prevent logical Layer 2 loops

answer

Spanning Tree Protocol (STP)

question

what is Spanning Tree Protocol (STP)

answer

STP allows for the redundancy required for reliability but eliminates the switching loops. It does this by providing a mechanism for disabling redundant paths in a switched network until the path is necessary, such as when failures occur. STP is an open standard protocol, used in a switched environment to create a loop-free logical topology.

question

what is link aggreation

answer

Link aggregation allows an administrator to increase the amount of bandwidth between devices by creating one logical link made up of several physical links. EtherChannel is a form of link aggregation used in switched networks

question

what are some advantages of etherchannel?

answer

- saves money - Most configuration tasks are done on the EtherChannel interface, instead of on each individual port - uses load balancing

question

OSPF Routers reach a FULL state of adjacency when?

answer

they have synchronized views on their link-state database

question

when are OSPF link-state updates sent?

answer

when network changes occur

question

All non-backbone areas must directly connect to _____

answer

area 0

question

Campus LAN Switches:

answer

To scale network performance in an enterprise LAN, there are core, distribution, access, and compact switches.

question

Cloud-Managed Switches:

answer

The Cisco Meraki cloud-managed access switches enable virtual stacking of switches. They monitor and configure thousands of switch ports over the web, without the intervention of onsite IT staff.

question

Data Center Switches:

answer

A data center should be built based on switches that promote infrastructure scalability, operational continuity, and transport flexibility. The data center switch platforms include the Cisco Nexus Series switches and the Cisco Catalyst 6500 Series switches.

question

Service Provider Switches:

answer

Service provider switches fall under two categories: aggregation switches and Ethernet access switches. Aggregation switches are carrier-grade Ethernet switches that aggregate traffic at the edge of a network. Service provider Ethernet access switches feature application intelligence, unified services, virtualization, integrated security, and simplified management.

question

Virtual Networking switches:

answer

Networks are becoming increasingly virtualized. Cisco Nexus virtual networking switch platforms provide secure multitenant services by adding virtualization intelligence technology to the data center network.

question

what are some common business considerations when selecting switch equipment

answer

- cost - port density (no. of ports available) - power - reliability - port speed - frame buffers - scalability

question

what are Frame Buffers

answer

The ability of the switch to store frames is important in a net- work where there might be congested ports to servers or other areas of the network.

question

what are forwarding rates?

answer

Forwarding rates define the processing capabilities of a switch by rating how much data the switch can process per second. Entry-level switches have lower forwarding rates than enterprise-level switches

question

what is wire speed?

answer

Wire speed is the data rate that each Ethernet port on the switch is capable of attaining.

question

FACT:

answer

Access layer switches typically do not need to operate at full wire speed, because they are physically limited by their uplinks to the distribution layer. This means that less expensive, lower-performing switches can be used at the access layer, and more expensive, higher-performing switches can be used at the distribution and core layers, where the forwarding rate has a greater impact on network performance.

question

what is power over ethernet?

answer

Power over Ethernet (PoE) allows the switch to deliver power to a device over the existing Ethernet cabling. This feature can be used by IP phones and some wireless access points

question

what allows virtual stacking of switches?

answer

Cisco Meraki cloud-managed access switches

question

where are multi layer switches typically deployed?

answer

the core and distribution layers

question

what are multi layer switches?

answer

Multilayer switches are characterized by their ability to build a routing table, support a few routing protocols, and forward IP packets at a rate close to that of Layer 2 forwarding

question

Multilayer switches often support specialized hardware, such as application-specific integrated circuits (ASIC). what are ASIC's?

answer

ASICs can streamline the forwarding of IP packets independent of the CPU.

question

what do routers use to route packets to their destination?

answer

the network portion of the destination ip address

question

what are some beneficial functions of routers?

answer

- Provide broadcast containment - Connect remote locations - Group users logically by application or department - Provide enhanced security

question

what is a branch router?

answer

Branch routers optimize branch services on a single platform while delivering an optimal application experience across branch and WAN infrastructures. Maximizing service availability at the branch requires networks designed for 24x7x365 uptime. Highly available branch networks must ensure fast recovery from typical faults, while minimizing or eliminating the impact on service, and provide simple network configuration and management.

question

what is a network edge router?

answer

Network edge routers enable the network edge to deliver high-performance, highly secure, and reliable services that unite campus, data center, and branch networks. Customers also want to access content anytime and anyplace they choose, over any device, whether at home, at work, or on the go. Network edge routers must deliver enhanced quality of service and nonstop video and mobile capabilities

question

what is a Service Provider Routers?

answer

- end-to-end scalable solutions and subscriber-aware services. - optimise operations, reduce expenses, and improve scalability and flexibility to deliver next-generation Internet experiences across all devices and locations. These systems are designed to simplify and enhance the operation and deployment of service-delivery networks.

question

what is Out-of-band management?

answer

is used for initial configuration or when a network connection is unavailable.

question

what does out of band management require?

answer

- Direct connection to console or AUX port - Terminal emulation client

question

what is In-band management?

answer

In-band management is used to monitor and make configuration changes to a net- work device over a network connection. Configuration using in-band management requires:

question

what does In-band management require?

answer

- At least one network interface on the device to be connected and operational - Telnet, SSH, or HTTP to access a Cisco device

question

A _______ should have a connection to two different access layer switches. It should have redundant modules when possible and a power backup source. It might be appropriate to provide multiple connections to one or more ISPs.

answer

mission-critical server

question

What are the expected features of modern enterprise networks?

answer

Support for converged network Support for critical applications

question

Which methods help to prevent the disruption of network services?

answer

Using redundant connections to provide alternate physical paths Installing duplicate equipment to provide failover services

question

Which feature could be used in a network design to increase the band width by combining multiple physical links into a single logical link?

answer

EtherChannel

question

Which network design solution will best extend access layer connectivity to host devices?

answer

Implementing wireless connectivity

question

How much traffic is a 48-port gigabit switch capable of generating when operating at full wire speed?

answer

48 Gb/s, by providing full bandwidth to each port

question

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?

answer

Network edge routers

question

What is a characteristic of out-of-band device management?

answer

It requires a terminal emulation client.

question

The number of ports available on a single switch is referred to as _______

answer

port density

question

Among the beneficial functions of a router are enhanced network security and containment of ______ traffic.

answer

broadcast

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