Questions 72. [xINx] The size of a window in a TCP segment establishes what? (Choose one.) a) The maximum number of bytes that
a single frame may not exceed Answer 73. [xINx] Which protocols are best described as connection-oriented and reliable? (Choose two.) a) UDP Answer This question is meant to be a little tricky. TCP is layer 4, which uses IP at layer 3. a) UDP port 53 Answer In the capture below NetXray interpolates the data and shows a source port of 1074 to a destination port of telnet. Refer to the data below the highlighted portion. 0x17 is 1*161 + 7* 160 = 23.
75. [xINx] TCP "source" port number(s): (Choose the one that best describes.) a) Depends on the application being
accessed on the destination host. Answer The source port in the following capture is 1074:
76. [xINx] In a TCP acknowledgment, the ack number refers to: (Choose one.) a) A sequential number beginning
with 1, and incremented by 1 with each exchange, that identifies this exchange of packets
as being complete Answer This number is the previous Sequence number +1. Check out the sequence and the acknowledgement numbers below:
Reference the diagram and configurations below for Questions 77 and 78:
Router_C#sh run Building configuration... Current configuration: ! version 11.2 ! hostname Router_C ! ! appletalk routing ipx routing 0060.09c3.df60 ! interface Ethernet0 ip address 172.16.1.1 255.255.255.0 appletalk cable-range 100-105 103.243 appletalk zone right ipx network DAD ! interface Ethernet1 no ip address shutdown ! interface Serial0 ip unnumbered Ethernet0 appletalk cable-range 120-120 120.17 appletalk zone left ipx network AD clockrate 56000 ! interface Serial1 no ip address shutdown ! router igrp 100 network 172.16.0.0 ! no ip classless !! line con 0 line aux 0 line vty 0 4 login ! end Router_B#sh run Building configuration... Current configuration: ! version 11.3 no service password-encryption ! hostname Router_B ! ! appletalk routing ipx routing 0007.7816.fe54 ! interface Loopback0 ip address 172.17.1.1 255.255.255.0 ! interface Serial0 ip unnumbered Loopback0 no ip mroute-cache appletalk cable-range 130-130 130.81 appletalk zone right ipx network CAD no fair-queue ! interface Serial1 ip unnumbered Loopback0 appletalk cable-range 120-120 120.125 appletalk zone left ipx network AD ! interface Serial2 no ip address shutdown ! interface Serial3 no ip address shutdown ! interface TokenRing0 no ip address shutdown ! interface BRI0 no ip address shutdown ! router igrp 100 network 172.17.0.0 ! ip classless ! ! ! ! ! line con 0 line aux 0 line vty 0 4 login ! end Router_A#sh run Building configuration... Current configuration: ! version 11.3 no service password-encryption ! hostname Router_A ! ! appletalk routing ipx routing 0010.7b15.bd41 ! interface Ethernet0/0 ip address 10.1.1.1 255.255.255.0 appletalk cable-range 106-110 106.17 appletalk zone left ipx network BAD ! interface Serial0/0 ip unnumbered Ethernet0/0 no ip mroute-cache appletalk cable-range 130-130 130.37 appletalk zone right ipx network CAD clockrate 56000 ! interface TokenRing0/0 no ip address shutdown ring-speed 16 ! interface FastEthernet1/0 no ip address shutdown ! router igrp 100 network 10.0.0.0 ! ip classless !! line con 0 line aux 0 line vty 0 4 login ! end
77. [RxNx] What routing protocols are configured? a) EIGRP, IGRP, RIP Answer Appletalk's RTMP and Novell's IPX RIP are the default routing protocols. Refer to the following routing tables of Router C: Router_C#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP, D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP, i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default U - per-user static route, o - ODR Gateway of last resort is not set I 10.0.0.0/8 [100/10576] via 172.17.1.1, 00:00:03, Serial0 172.16.0.0/24 is subnetted, 1 subnets C 172.16.1.0 is directly connected, Ethernet0 172.17.0.0/16 is variably subnetted, 2 subnets, 2 masks I 172.17.1.0/32 [100/8976] via 172.17.1.1, 00:00:03, Serial0 I 172.17.0.0/16 [100/8976] via 172.17.1.1, 00:00:03, Serial0 Router_C#sh app route Codes: R - RTMP derived, E - EIGRP derived, C - connected, A - AURP S - static P - proxy 4 routes in internet The first zone listed for each entry is its default (primary) zone. C Net 100-105 directly connected, Ethernet0, zone right R Net 106-110 [2/G] via 120.125, 2 sec, Serial0, zone left C Net 120-120 directly connected, Serial0, zone left R Net 130-130 [1/G] via 120.125, 2 sec, Serial0, zone right Router_C#sh ipx route Codes: C - Connected primary network, c - Connected secondary network S - Static, F - Floating static, L - Local (internal), W - IPXWAN R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate s - seconds, u - uses 4 Total IPX routes. Up to 1 parallel paths and 16 hops allowed. No default route known. C AD (HDLC), Se0 C DAD (NOVELL-ETHER), Et0 R BAD [13/02] via AD.0007.7816.fe54, 28s, Se0 R CAD [07/01] via AD.0007.7816.fe54, 28s, Se0
78. [RXNx] The Serial 0/0 IPX encapsulation of Router_A is: a) Novell-ether Answer The default encapsulation for a serial interface is HDLC. Refer to the IPX routing table below: Router_A#sh ipx route %SYS-5-CONFIG_I: Configured from console by console Codes: C - Connected primary network, c - Connected secondary network S - Static, F - Floating static, L - Local (internal), W - IPXWAN R - RIP, E - EIGRP, N - NLSP, X - External, A - Aggregate s - seconds, u - uses, U - Per-user static 4 Total IPX routes. Up to 1 parallel paths and 16 hops allowed. No default route known. C BAD (NOVELL-ETHER), Et0/0 C CAD (HDLC), Se0/0 R AD [07/01] via CAD.0007.7816.fe54, 89s, Se0/0 R DAD [13/02] via CAD.0007.7816.fe54, 89s, Se0/0
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