WAN
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Questions and Answers

What is the primary function of WANs?

  • Connect LANs (correct)
  • Connect home users to LANs
  • Connect mobile devices
  • Connect printers to the Internet

    • How are WANs commonly used in enterprise networks?

  • To connect LANs to the Internet
  • To connect remote sites to the enterprise network (correct)
  • To connect LANs to home users
  • To connect mobile devices to the Internet

    • In what way do WANs benefit home users?

  • By providing faster LAN connections
  • By connecting home users to LANs
  • By connecting home users to the Internet (correct)
  • By connecting home users to mobile devices

    • How do enterprise networks connect remote sites and users over the Internet?

    <p>By using security and privacy solutions</p> Signup and view all the answers

    Which WAN topology involves a dedicated leased-line connection such as T1/E1?

    <p>Point-to-Point</p> Signup and view all the answers

    In which WAN topology does a single interface on the hub router connect to multiple spoke routers through virtual interfaces?

    <p>Hub-and-Spoke</p> Signup and view all the answers

    Which WAN topology requires each router to have a connection to every other router, requiring a large number of virtual interfaces?

    <p>Full Mesh</p> Signup and view all the answers

    What is the purpose of a dual-homed WAN topology?

    <p>To provide redundancy for a single-homed or hub-and-spoke topology(by providing a second hub to connect to spoke routers)</p> Signup and view all the answers

    Which type of business typically consists of one LAN at one location that connects to the Internet through broadband technology?

    <p>Small Office</p> Signup and view all the answers

    In a Campus Network, what type of business setup is used to connect to the internet?

    <p>Small- to medium-sized business with multiple LANs at one location</p> Signup and view all the answers

    What distinguishes Branch Networks in terms of WAN strategy as a business grows(adding more branch offices, each with its own campus network)?

    <p>WAN contracts to connect remote networks are negotiated</p> Signup and view all the answers

    What do WAN operations primarily focus on in terms of OSI layers? (A) Data link layer. (B) Network layer. (C) Transport layer. (D) Physical layer. Choose two

    <p>D, A</p> Signup and view all the answers

    What do Layer 1 protocols describe in WAN operations?

    <p>How to provide electrical, mechanical, operational, and functional connections</p> Signup and view all the answers

    What do Layer 2 protocols define in WAN operations?

    <p>How data is encapsulated</p> Signup and view all the answers

    What is the function of Customer Premises Equipment (CPE) in a WAN setup?

    <p>Owned by the business or leased from the service provider</p> Signup and view all the answers

    What role does Data Communications Equipment (DCE) play in WAN connectivity?

    <p>Provides an interface to connect subscribers to a communication link on the WAN cloud</p> Signup and view all the answers

    How does Data Terminal Equipment (DTE) connect to the local loop in a WAN setup?

    <p>Connects to the local loop through the DCE</p> Signup and view all the answers

    What is the demarcation point in a WAN connection, and what is its significance?

    <p>Separates customer equipment from service provider equipment (is the place where the responsibility for the connection changes from the user to the service provider)</p> Signup and view all the answers

    What is the purpose of the Local Loop in a WAN network?

    <p>cable that connects the CPE to the CO of the service provider (last mile)</p> Signup and view all the answers

    What does the Central Office (CO) serve as in a WAN infrastructure?

    <p>Local service provider facility that connects the CPE to the provider network.</p> Signup and view all the answers

    What does the Toll network do in the context of WAN services?

    <p>All the cabling and equipment inside the WAN provider network</p> Signup and view all the answers

    Which WAN device converts digital signals into voice frequencies to be transmitted over analog lines of the public telephone network?

    <p>Dial-up modem</p> Signup and view all the answers

    What is the primary function of the access server?

    <p>legacy WAN technology that coordinates dial-in and dial-out user communications</p> Signup and view all the answers

    Which WAN device is used with high-speed DSL or cable Internet service?

    <p>Broadband modem</p> Signup and view all the answers

    What is the purpose of a CSU/DSU device in a WAN setup?

    <p>Convert digital leased-line signals into frames that the LAN can interpret and vice versa</p> Signup and view all the answers

    Which WAN device is a multiport internetworking device commonly used in service provider networks?

    <p>WAN switch</p> Signup and view all the answers

    What is the primary role of a router in a WAN environment?

    <p>Provides internetworking and WAN access interface ports to connect to the service provider network</p> Signup and view all the answers

    Where is a core router/Multilayer switch typically located within the WAN architecture and its purpose?

    <p>Within the backbone of the WAN, it supports multiple interfaces, and forwards IP packets at full line speed</p> Signup and view all the answers

    How do circuit-switched networks operate in a WAN environment?

    <p>Require a dedicated circuit between source and destination before user communication (making telephone calls)</p> Signup and view all the answers

    What is a characteristic of packet-switched networks in WAN operations?

    <p>Split traffic into packets for routing over a shared network</p> Signup and view all the answers

    WANs can operate as circuit-switched or packet-switched networks ?

    <p>True</p> Signup and view all the answers

    Two way that a business can get WAN access, Private WAN Infrastructure and Public WAN Infrastructure.

    <p>True</p> Signup and view all the answers

    In a private WAN infrastructure, how can a business typically obtain WAN access?

    <p>The business negotiates with a service provider for dedicated or switched WAN access.</p> Signup and view all the answers

    How is WAN access typically achieved in a public WAN infrastructure?

    <p>By using broadband connections over the Internet and VPNs to secure the connections.</p> Signup and view all the answers

    Which of the following is an advantage of using a dial-up connection? (A) Availability. (B) Complex setup process. (C) Simplicity. (D) High flexibility. (E) Quality. Choose three answers

    <p>C, A, E</p> Signup and view all the answers

    Which of the following is a disadvantage associated with dial-up connections? Choose two answers (A) Low initial setup cost. (B) Limited flexibility. (C) High data transfer speeds. (D) Cost.

    <p>B, D</p> Signup and view all the answers

    What types of traffic can PVCs carry based on the information provided?

    <p>Both voice and data traffic</p> Signup and view all the answers

    How are PVCs uniquely identified in a network environment?

    <p>By DLCIs (data-link connection identifier)</p> Signup and view all the answers

    How do PVCs and DLCIs contribute to communication from one DTE device to another according to the information provided?

    <p>They enable bidirectional communication</p> Signup and view all the answers

    In the given scenario, what DLCI does R1 use to reach R2, and what DLCI does R2 use to reach R1?

    <p>R1 uses DLCI 102 to reach R2, and R2 uses DLCI 201 to reach R1</p> Signup and view all the answers

    on what architecture is atm built on?

    <p>cell-based architecture</p> Signup and view all the answers

    What is the fixed length of ATM cells?

    <p>53 bytes</p> Signup and view all the answers

    pick 5 of the features and benefits of ethernet wan:

    (A) Reduced expenses and administration. (B) Easy integration with existing networks.  (C) Increased compatibility options. (D) Service providers now offer Ethernet WAN service using fiber-optic cabling. (E) Known as Local Ethernet (LocE) and Fiber Ethernet (FibE). (F) Known as Wide Area Ethernet (WAE) and Satellite Ethernet (SatE). (G) Known as Metropolitan Ethernet (MetroE), Ethernet over MPLS (EoMPLS), and Virtual Private LAN Service (VPLS). (I) Enhanced business productivity.

    <p>A, B, D, G, I</p> Signup and view all the answers

    Ethernet WAN is commonly utilized to replace which traditional WAN technologies for network connections?

    <p>Frame Relay and ATM</p> Signup and view all the answers

    In Multiprotocol Label Switching (MPLS) which is a multiprotocol high-performance WAN technology, how is data directed from one router to the next based on the provided information?

    <p>By using short path labels</p> Signup and view all the answers

    Multiprotocol Label Switching (MPLS) directs data from one router to the next, based on IP network addresses rather than short path labels

    <p>False</p> Signup and view all the answers

    What type of solution is Very Small Aperture Terminal (VSAT) known for, based on the provided information?

    <p>Setting up private WANs using satellite communications</p> Signup and view all the answers

    What technology uses existing twisted-pair telephone lines to transport high-bandwidth data and provides IP services to subscribers?

    <p>DSL</p> Signup and view all the answers

    How does a DSL modem convert the signal from the user device?

    <p>from an Ethernet signal to a DSL signal, which is transmitted to the central office.</p> Signup and view all the answers

    From where is network access available?

    <p>Fiber-optic networks</p> Signup and view all the answers

    What type of connection and installation do cable modems provide?

    <p>Always-on connection and a simple installation.</p> Signup and view all the answers

    What is the purpose of municipal Wi-Fi?

    <p>Many cities have begun setting up municipal wireless</p> Signup and view all the answers

    What does WiMAX stand for?

    <p>Worldwide Interoperability for Microwave Access</p> Signup and view all the answers

    In which situations is Satellite Internet typically used?

    <p>by rural users where cable and DSL are not available in rural areas</p> Signup and view all the answers

    New developments in broadband wireless technology include:

    (A) wifi. (B) Ethernet. (C) WiMAX. (D) Satellite Internet.  (E) Municipal Wi-Fi. (F) Router. Choose three

    <p>C, D, E</p> Signup and view all the answers

    What do the terms 3G/4G Wireless estand for in the cellular industry?

    <p>3rd and 4th Generation</p> Signup and view all the answers

    Which technology is considered to be part of the 4th generation (4G) and is newer and faster?

    <p>Long-Term Evolution (LTE)</p> Signup and view all the answers

    why do public WANs rely on VPNs when data crosses a public network like the Internet?

    <p>Securing data between private networks</p> Signup and view all the answers

    Which of the following are benefits of using VPNs for public WANs? (A) speed. (B) Security. (C) Scalability. (D) Cost savings. (E) Compatibility with broadband technology. (F) Real-time monitoring. Choose four

    <p>B, C, D, E</p> Signup and view all the answers

    What are the two types of VPN mentioned in the text?

    <p>Site-to-site VPNs and Remote-access VPNs</p> Signup and view all the answers

    How are permanent, dedicated point-to-point connections provided in networking using leased lines?

    <p>Using leased lines</p> Signup and view all the answers

    How can security over public infrastructure connections be provided according to the text?

    <p>Using remote-access or site-to-site Virtual Private Networks (VPNs)</p> Signup and view all the answers

    Which of the following is included in private WAN connections? (A) Dialup. (B) ISDN. (C) Frame Relay. (D) Satellite Internet. (E) Metro Ethernet. (F) MPLS. (G) VSAT. (H) ATM. (M) Cable. (N) DSL. Choose seven

    <p>A, B, C, E, F, G, H</p> Signup and view all the answers

    Which of the following is included in public WAN connections? (A) DSL. (B) Cable (C) Wireless. (D) Fiber-optic. (E) Cellular. (F) ATM. (I) ISDN. Choose four

    <p>A, B, C, E</p> Signup and view all the answers

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