Yes I confirm for both your questions. As we can see:
adm@FW# run show interfaces ge-0/0/4
Physical interface: ge-0/0/4, Enabled, Physical link is Up
Interface index: 138, SNMP ifIndex: 528
Description: Guest
Link-level type: Ethernet, MTU: 1514, Link-mode: Full-duplex, Speed: 1000mbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,
Remote fault: Online
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x0
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Current address: 64:87:88:4e:0c:04, Hardware address: 64:87:88:4e:0c:04
Last flapped : 2012-06-19 08:10:24 BST (1w0d 09:39 ago)
Input rate : 232 bps (0 pps)
Output rate : 0 bps (0 pps)
Active alarms : None
Active defects : None
Interface transmit statistics: Disabled
Logical interface ge-0/0/4.0 (Index 76) (SNMP ifIndex 529)
Flags: SNMP-Traps 0x0 Encapsulation: ENET2
Input packets : 342367
Output packets: 0
Security: Zone: GUEST
Allowed host-inbound traffic : bootp bfd bgp dns dvmrp igmp ldp msdp nhrp ospf ospf3 pgm pim rip ripng router-discovery rsvp sap vrrp dhcp finger ftp tftp ident-reset http https ike netconf ping reverse-telnet reverse-ssh rlogin rpm
rsh snmp snmp-trap ssh telnet traceroute xnm-clear-text xnm-ssl lsping ntp sip dhcpv6 r2cp
Protocol inet, MTU: 1500
Flags: Sendbcast-pkt-to-re, Sample-input, Sample-output
Addresses, Flags: Is-Preferred Is-Primary
Destination: 172.18.100/24, Local: 172.18.100.254, Broadcast: 172.18.100.255
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adm@FW#