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FINAL SEMESTER 4 Which of the following authentication processes provides protection against playback attacks? CHAP DDI PAP TCP a Which device provides connection functions to an ISDN network for a non-ISDN terminal? NT1 NT2 TA TX c What does the ISDN BRI provide? 23 B channels and one 64Kbps D channel Total bit rate up to 1.536 Mbps Two 56Kbps B channels and one 64Kbps D channel Two 64Kbps B channels and one 16Kbps D channel d Which device connects four-wire ISDN subscriber wiring to the conventional two-wire local loop? NT1 NT2 TE1 TE2 a Which LMI types are available with Cisco routers? ansi, cisco, HDLC ansi, cisco, q933a ansi, cisco, DLCI cisco, IETF b The point at which the CPE ends is known as what? Point of presence Local loop DTE Demarcation d Which command creates a subinterface? Router(config-if)# int s0.115 Router(config-if)# int s0 subinterface 115 Router(config-if)# subinterface 115 Router(config-if)# subinterface s0.115 a Which utility shows the route a packet takes to reach its destination? Netstat Ping Telnet Tracert d Which device, typically found in digital PBX's, performs Layer 2 and Layer 3 protocol functions? NT1 NT2 TE1 TE2 d What is a major advantage of circuit-switched networks over packet-switched networks? It allows network devices to share a single point-to-point link. It involves transmission of messages from node to node through a network. It offers more flexibility and uses network bandwidth more efficiently. It offers users dedicated bandwidth that cannot be infringed upon by other users d When connecting two routers from different vendors using a dedicated point-to-point connection, which type of encapsulation should be used? Cisco HDLC IETF PPP d What is Cisco's default encapsulation for serial lines? ADSL HDLC PPP SDLC b Which methods do frame relay switches use to inform DTEs of congestion within the frame relay network? CCP and LMI CIR and LATE DLCI and SPID FECN and BECN d Which method does a router use to build a Frame Relay map? ARP requests RARP requests Inverse RARP requests Inverse ARP requests d What is the reference point for a connection between a TA and a non-ISDN-compatible device? R S T U a What is the name of the database generated by SNMP that contains network management information? ICMP MIB RMON TRAP b Which of the following does CHAP use to increase security? Password sent in clear text Periodic verification of identity Separate hostname on each router Two-way handshake b Which layers of the OSI model are WANs focused on? Network and transport Physical and data link Network and data link Physical and network b Which of the following is the ISDN Layer 2 signaling protocol? BRI PRI LAPA LAPD d In a hierarchical design which device is used for data path determination? Hubs Switches Routers Bridges c Which type of device does PPP use to provide a reliable connection? Switches Routers Concentrators Hubs b Which of the following commands displays current TCP/IP network connections? Ping Tracert Telnet Netstat d
Kod:
Which type of circuit would be used in situations where data transfer between devices is constant? Permanent Virtual Circuit Switched Virtual Circuit Temporary Virtual Circui Uniform Virtual Circuit a Which OSI layer performs the following types of encapsulation: ISDN, Frame Relay, and HDLC? Network Session Data link Transport c In Frame Relay, which field is used to ensure the integrity of the transmitted data? DLCI FCS Frame Number LMI b A router is normally referred to as which type of device? DCE DTE CPE CO b What does remote monitoring use to gather data? SNMP agent RMON probe SNTP server MIB b What are leased or owned devices that reside at the subscriber's location? CO Switch CPE Demarc Local Loop b Connection-oriented services involve which three phases? Connection establishment, Data transfer, Connection termination Connection establishment, Data transfer, Flow control Connection establishment, Flow control, Connection termination Data transfer, Flow control, Connection termination a What does PPP use to establish, configure, and test the WAN link? Network control program Link control protocol Simple network management protocol Dynamic host configuration protocol b What is the function of the service profile identifiers or SPIDs? Replace the DLC number Used instead of subnetting Identify line configuration Logical address of the ISDN router c Which command is used to configure a subinterface that will forward broadcasts and routing updates? router(config-if)#interface serial 1 multipoint router(config-if)#interface serial 1 point-to-point router(config-if)#interface serial 1.1 multipoint router(config-if)#interface serial 1.1 point-to-point c What is a terminal that can connect directly to an ISDN network? NT1 NT2 TE1 TE2 c ISDN voice/video/data channels operate at what speed? 16 kbps 28.8 kbps 32 kbps 64 kbps d XYZ Company is considering online video training applications. Which issue is most important when deploying this application on the network? Equipment location Business-critical traffic WAN service selection Media selection b Which type of handshaking occurs when using CHAP? One-way Two-way Three-way Four-way c Which kind of data is carried on ISDN B channels? Analog Sideband signals Signal and control Voice and data d What is used to indicate the beginning or end of a PPP frame? Address bits Control bits Frame sequencing Flags d Which ISDN channel is used to establish call setup? Channel D Channel B Channel Call setup Channel C a When configuring ISDN on a router, if a SPID is a required, from whom is the SPID obtained? Network administrator User Service provider Internic c Which type of Frame Relay message is used to ensure that both sides will continue to see an active connection? Keepalives Call reference Status-inquiry Information element a Which of the following is an alternative to a dedicated WAN link? X.25 ISDN T1 DS3 b What does CIR designate in a Frame-Relay connection? Guaranteed rate that the service provider commits to providing Maximum data burst rate that the switch can handle Number of simultaneous virtual circuits available from a service provider Number of simultaneous DLCIs that can be established across the cloud a Which protocol supports Network Management? SMTP NFS SNMP FTP c Regarding Frame Relay, which of the following statements is true? You must use ANSI encapsulation when connecting to non-Cisco equipment. You must use Cisco encapsulation when connecting to non-Cisco equipment. You must use IETF encapsulation when connecting to non-Cisco equipment. You must use q933a encapsulation when connecting to non-Cisco equipment. c In which layer of the three-layer design model is policy-based connectivity implemented? Core Access Distribution Workgroup c Which command is used to display the hardware addresses in the arp cache? tracert arp -a rarp -a arp -s b Which command is used to configure an interface for PPP encapsulation? router>encapsulation ppp router#encapsulation ppp router(config)#encapsulation ppp router(config-if)#encapsulation ppp d Which of the following commands can you use to check LCP and NCP states when PPP is configured? Show encapsulation Show interfaces Show running-configuration Show version b Which type of ACL only checks the source address? Extended ACL General ACL Source ACL Standard ACL d Which of the following is true regarding routing metrics? All routing protocols use the same metrics. IGRP uses bandwidth as its only metric. Routers compare metrics to determine the best route. The larger metric generally represents the better path c Switches that receive the entire frame before sending it, use which type of frame forwarding? Cut-through Receive and send Copy and send Store-and-forward d What is the encapsulation type on a router for a Novell network running version 3.12? Novell-ether ARPA SNAP SAP d What do routers use to maintain tables? Broadcast forwarding IP Tunneling Routed protocols Routing protocols d
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